Montana — State Legislative Term Limits (1992–Present)

Eight Years in Sixteen, Rolling Ballot-Access Restoration, and a Write-In Election Pathway

Montana operates through a constitutional chamber-specific rolling-window ballot-access regime. Article IV, §8 restricts ordinary certification and named-ballot access when, by the end of the relevant term, a candidate will have served eight or more years in any sixteen-year period in the legislative chamber sought.

House and Senate service are calculated separately. As earlier service moves outside the sixteen-year window, the amount of service remaining within the calculation declines and ordinary ballot access can become available again. A person who completes eight continuous years in one chamber ordinarily regains ordinary access after an eight-year interval.

Article IV, §8 also preserves an express write-in exception. An otherwise qualified candidate may be certified as nominated or elected through write-in votes even while the ordinary certification and named-ballot restriction applies. The eight-years-in-sixteen threshold therefore does not create complete eligibility exhaustion.

The original initiative applied the new limits to terms beginning during or after January 1993. Article IV, §8(2) also excludes time served in terms ending during or before January 1993. Where those provisions could conflict, Montana Attorney General Opinion 47-9 concluded that CI-64’s term-beginning applicability clause controls.

Status: Operative (constitutional)

Adopted: November 3, 1992 — Constitutional Initiative No. 64

Effective: January 1, 1993

Legislative offices covered: Montana House of Representatives; Montana Senate

Eligibility Regime Architecture
Single-Class Chamber-Specific Rolling-Window Ballot-Access Regime
(Constitutional · Eight Years in Sixteen · Temporal Restoration · Write-In Exception)

Transition Architecture
Term-Beginning Applicability Baseline
(Terms Beginning During or After January 1993 Counted · Pre-1993 Terms Excluded)

Governing Text

Montana Constitution, Article IV, §8 — Limitation on terms of office

The current constitutional text provides:

(1) The secretary of state or other authorized official shall not certify a candidate’s nomination or election to, or print or cause to be printed on any ballot the name of a candidate for, one of the following offices if, at the end of the current term of that office, the candidate will have served in that office or had he not resigned or been recalled would have served in that office:

(b) 8 or more years in any 16-year period as a state representative;

(c) 8 or more years in any 16-year period as a state senator;

(2) When computing time served for purposes of subsection (1), the provisions of subsection (1) do not apply to time served in terms that end during or prior to January 1993.

(3) Nothing contained herein shall preclude an otherwise qualified candidate from being certified as nominated or elected by virtue of write-in votes cast for said candidate.

Adopted November 3, 1992, through Constitutional Initiative No. 64; effective January 1, 1993.

Official state text:
Montana Constitution, Article IV, §8

Plain-text mirror:
Montana Constitution, Article IV, §8 — Justia

Eligibility Architecture

Montana measures legislative service through separate rolling sixteen-year calculations for the House and Senate. The constitutional consequence is directed principally at ordinary certification and named-ballot access rather than complete eligibility for the office.

Rolling-window threshold:
Eight or more years of service in any sixteen-year period in the chamber sought.

Institutional scope:
Montana House of Representatives and Montana Senate.

Counting unit:
Years of service.

Aggregation:
Chamber-specific. House service enters the House calculation and Senate service enters the Senate calculation.

Cross-chamber relationship:
Service in one chamber does not enter the other chamber’s rolling-window calculation. Movement between chambers therefore opens the independently calculated allowance of the destination chamber.

Decision point:
The constitutional calculation asks whether, by the end of the relevant term, the candidate will have served—or absent resignation or recall would have served—eight or more years in the office within a sixteen-year period.

Ordinary access consequence:
When the threshold applies, election officials may not certify the candidate’s nomination or election through the ordinary process or print the candidate’s name on the ballot.

Write-in exception:
An otherwise qualified candidate may nevertheless be certified as nominated or elected through write-in votes.

Restoration of ordinary ballot access:
As earlier service moves outside the rolling sixteen-year period, counted service declines. Ordinary certification and named-ballot access become available again when the governing calculation no longer reaches the constitutional threshold.

Ordinary continuous-service configuration:
Eight continuous House years ordinarily consist of four two-year terms. Eight continuous Senate years ordinarily consist of two four-year terms. After such a continuous sequence, an eight-year interval ordinarily removes those eight service years from the relevant sixteen-year window.

Resignation and recall:
The calculation includes service the candidate would have completed had the person not resigned or been recalled.

Lifetime structure:
Article IV, §8 establishes no permanent lifetime legislative-service boundary. Rolling restoration, independent chamber calculations, and the write-in exception permit legislative service beyond a single eight-year sequence.

Transition baseline:
CI-64 applies the limits to terms beginning during or after January 1993. Article IV, §8(2) separately excludes time served in terms ending during or before January 1993. Attorney General Opinion 47-9 holds that the term-beginning applicability provision controls where the two provisions would otherwise conflict.

Montana therefore operates through temporary restriction of ordinary certification and named-ballot access within separate chamber-specific rolling windows, accompanied by temporal restoration and an express write-in pathway that prevents the threshold from functioning as complete eligibility exhaustion.

How the Limits Operate

Montana maintains separate rolling service histories for the House and Senate. The calculation asks whether, by the end of the relevant term, the candidate will have served eight or more years in that office within a sixteen-year period.

For ordinary continuous full-term service:

  • House: Four consecutive two-year terms produce eight years of service.

  • Senate: Two consecutive four-year terms produce eight years of service.

  • Chamber movement: House and Senate service remain in separate calculations. Service in one chamber does not consume the rolling-window allowance of the other.

  • Rolling restoration: Earlier service leaves the calculation as it moves outside the sixteen-year period.

  • Write-in pathway: An otherwise qualified candidate who is restricted from ordinary certification and named-ballot access may still be nominated or elected through write-in votes.

  • Resignation or recall: The calculation includes the service the candidate would have completed had the person not resigned or been recalled.

A person who completes eight continuous years in one chamber ordinarily requires an eight-year interval before the same eight years have passed outside the sixteen-year window and ordinary ballot access becomes available again. Service in the other chamber may occur during that interval because each chamber has an independent calculation.

The restriction does not require the affected person to remain outside the office throughout that interval. Article IV, §8(3) preserves write-in nomination and election for an otherwise qualified candidate. The architecture therefore distinguishes restoration of ordinary ballot access from continued legal availability through the write-in pathway.

Candidate filing is assessed with reference to the term sought. A candidate may file when the required interval will have been completed by the time the candidate begins serving the new term. The filing date itself therefore need not occur after completion of the full interval.

Montana can consequently produce recurring service in the same chamber across a lifetime. Ordinary ballot access returns as prior service ages out of the rolling window, while write-in election can authorize additional service before that restoration occurs. Independent House and Senate calculations also permit legislative service in the other chamber while the first chamber’s rolling-window calculation changes over time.

Legislative History and Revision

Montana’s operative legislative term-limit architecture originated in 1992 and has received no subsequent constitutional revision. Later litigation, a rejected constitutional amendment, and administrative clarification affected its legal and operational setting without replacing the original eight-years-in-sixteen structure.

1992 adoption — Constitutional Initiative No. 64

Montana voters approved Constitutional Initiative No. 64 on November 3, 1992. CI-64 added Article IV, §8 and established:

  • eight years in any sixteen-year period for state representatives;

  • eight years in any sixteen-year period for state senators;

  • separate calculations for the two legislative chambers;

  • a prospective transition applying the limits to terms beginning during or after January 1993, together with the codified exclusion for time served in terms ending during or before January 1993;

  • counterfactual counting of service that would have been completed absent resignation or recall; and

  • an express exception preserving certification through write-in votes for an otherwise qualified candidate.

Election result:
CI-64 was approved with 264,174 votes in favor (66.90%) and 130,695 opposed (33.10%).

The amendment became effective January 1, 1993.

1995 — Federal provisions rendered unenforceable

CI-64 also contained term-limit provisions governing candidates for the United States House and Senate. U.S. Term Limits, Inc. v. Thornton rendered those federal provisions unenforceable. The state legislative provisions remained operative.

1997 — Transition and calculation clarified

Montana Attorney General Opinion 47-9 addressed ambiguities in CI-64’s transition and service calculation. CI-64 §3 provided that the amendment applied to terms beginning during or after January 1993, while Article IV, §8(2) excluded time served in terms ending during or before January 1993.

The Attorney General concluded that the term-beginning applicability provision controls when the two provisions would otherwise conflict. A Senate term beginning in January 1991 therefore did not enter the term-limit calculation even though it ended after January 1993; for a senator serving continuously from 1991, the first countable term was the term beginning in January 1995.

The opinion also concluded that complete House and Senate terms are treated as two and four years respectively and that the sixteen-year period is evaluated through the conclusion of the term for which the candidate seeks election.

2002 — Cole v. State ex rel. Brown

Two state senators and two electors challenged CI-64’s enactment, arguing that application of the initiative to multiple offices violated constitutional requirements governing submission of amendments.

In Cole v. State ex rel. Brown, 2002 MT 32, the Montana Supreme Court held that the challenge was barred by laches because of the delay between CI-64’s 1992 adoption and the 2001 filing of the action. The Court therefore did not decide the underlying constitutional merits. CI-64 remained operative.

2004 — Constitutional Amendment No. 42 rejected

The Legislature referred Constitutional Amendment No. 42 to voters. C-42 would have changed the legislative calculation from eight years in any sixteen-year period to twelve years in any twenty-four-year period.

Voters rejected C-42 on November 2, 2004:

  • For: 136,931 — 31.40%

  • Against: 299,162 — 68.60%

The rejection left the original eight-years-in-sixteen architecture unchanged.

2011–2012 — Administrative timing clarified

Senate Bill 311 supplied statutory implementation for Article IV, §8. Montana Attorney General Opinion 54-4 subsequently concluded that a candidate may file for an affected office when, at the time the candidate would begin serving the new term, the candidate will have completed the required eight-year break in service over the relevant sixteen-year period.

The clarification concerns the timing of candidacy and administration of the rolling window. It did not alter the constitutional threshold, chamber-specific calculation, or write-in exception.

Current status

Montana’s legislative term-limit text has received no constitutional revision since CI-64 was adopted in 1992. The operative architecture remains a chamber-specific eight-years-in-sixteen rolling-window ballot-access regime with temporal restoration of ordinary ballot access and an express write-in pathway.

Transition Architecture

Constitutional Initiative No. 64 established a prospective applicability boundary for the new term-limit architecture.

CI-64 §3 provided that the amendment applies to terms beginning during or after January 1993. Article IV, §8(2), as codified in the Constitution, separately provides that the restriction does not apply to time served in terms ending during or before January 1993.

Montana Attorney General Opinion 47-9 reconciled those provisions. Where their application would produce conflicting results, the initiative’s term-beginning applicability clause controls. A Senate term beginning in January 1991 and ending in 1995 therefore remained outside the calculation; the first countable term for a continuously serving senator in that situation was the term beginning in January 1995.

Transition classification:
Term-Beginning Applicability Baseline

Applicability:
CI-64 applies the new limits to terms beginning during or after January 1993.

Excluded antecedent terms:
Terms beginning before January 1993 remain outside the calculation where inclusion would conflict with CI-64’s applicability clause.

Codified exclusion:
Article IV, §8(2) independently excludes time served in terms ending during or before January 1993.

Separate legacy class:
None. Incumbents and later entrants became subject to the same architecture according to the prospective term applicability rule.

Convergence:
Once terms beginning before January 1993 passed from active service histories, the transitional distinction ceased to affect the rolling-window calculation.

The transition therefore used a prospective term-based applicability rule rather than carrying portions of pre-effective-date Senate terms into the new service history.

Authority Over Revision

Montana’s legislative term-limit architecture is constitutional. Alteration of the eight-years-in-sixteen threshold, chamber-specific calculation, rolling-window structure, counterfactual service rule, transition provision, or write-in exception therefore requires constitutional revision.

Citizen amendment proposal authority:
Article XIV, §9 authorizes the people to propose constitutional amendments by initiative. A qualifying petition requires signatures from at least ten percent of the state’s qualified electors, including at least ten percent of the qualified electors in each of two-fifths of the legislative districts.

Legislative amendment proposal authority:
Article XIV, §8 authorizes any member of the Legislature to propose a constitutional amendment. Referral requires an affirmative roll-call vote of two-thirds of all members of the Legislature.

Adoption authority:
A constitutional amendment proposed through either pathway must be approved by a majority of the electors voting on the amendment.

Constitutional-convention proposal authority:
Article XIV also provides separate routes for submitting the question of an unlimited constitutional convention. The Legislature may submit the question by a two-thirds vote, the people may initiate the question by petition, and the convention question is periodically submitted under the Constitution’s twenty-year provision. A convention itself proceeds only after statewide voter authorization. Revisions, alterations, or amendments produced by the convention must subsequently be submitted to the electors and approved by a majority voting on them before taking effect.

Ordinary legislative authority:
The Legislature may enact implementation provisions consistent with Article IV, §8 but cannot alter the constitutional threshold or write-in exception through ordinary statute.

Administrative authority:
Election officials apply the constitutional rolling-window calculation, determine ordinary ballot access and certification, administer candidate filings, and certify qualifying write-in nominations and elections.

Judicial authority:
Courts retain authority to interpret Article IV, §8 and the constitutional procedures governing its adoption or revision. Cole v. State ex rel. Brown resolved the 2002 procedural challenge through laches without deciding the underlying constitutional merits.

Montana therefore distributes constitutional proposal authority among citizen initiative, legislative referral, and convention processes, while statewide electors authorize a convention and ratify amendments or convention-produced revisions before they take effect.

Constitutional revision procedures:

Observed Structural Relationships

The operative architecture establishes several interacting structural relationships:

  • Rolling-window measurement: Earlier service leaves the sixteen-year calculation as time passes, reducing the amount of service attributed to the candidate within the operative window.

  • Temporary ordinary-access restriction: Reaching the eight-years-in-sixteen threshold restricts ordinary certification and named-ballot access in the affected chamber.

  • Write-in continuity: Article IV, §8(3) preserves nomination and election through write-in votes for an otherwise qualified candidate during the ordinary-access restriction.

  • Chamber-specific aggregation: House and Senate service remain in separate calculations. Service in one chamber does not consume the rolling-window allowance of the other.

  • Cross-chamber sequencing: A person may serve in the other chamber while prior service in the first chamber ages out of its rolling window.

  • No permanent legislative endpoint: Rolling restoration, separate chamber calculations, and the write-in exception permit cumulative legislative service beyond a single eight-year sequence.

  • Equal nominal chamber duration: Both chambers use the same eight-years-in-sixteen threshold for ordinary ballot access.

  • Differentiated authorization frequency: Eight continuous House years ordinarily require four elections, while eight continuous Senate years ordinarily require two.

  • Counterfactual service counting: Resignation or recall does not shorten the scheduled service used in the constitutional calculation.

  • Prospective term applicability: CI-64 applies the architecture to terms beginning during or after January 1993; Attorney General Opinion 47-9 applies that rule where the codified term-end exclusion would otherwise produce a conflicting result.

  • Temporal restoration: Ordinary certification and named-ballot access return once sufficient prior service lies outside the sixteen-year calculation.

  • Conditional interruption: The architecture can produce a period outside a chamber, but neither the write-in exception nor movement to the other chamber requires complete legislative interruption.

Montana therefore combines a temporary rolling restriction on ordinary ballot access with continued write-in availability, independent chamber calculations, and temporal restoration rather than permanent eligibility exhaustion.

Structural Validity Assessment

Equal Application and Applicability Coherence:
The same chamber-specific eight-years-in-sixteen calculation, counterfactual resignation-and-recall rule, transition provision, and write-in exception apply to candidates governed by Article IV, §8.

Unit of Limitation and Measurement Determinacy:
Years of service provide the counting unit. The constitutional calculation asks whether, by the end of the relevant term, the candidate will have served eight or more years in the office within a sixteen-year period.

Aggregation and Identity Persistence:
Service follows the individual across districts and periods of service within the same chamber. House and Senate histories remain separate, and earlier service leaves the operative calculation as it passes outside the rolling window.

Ordinary Ballot-Access Restriction and Restoration:
Reaching the threshold restricts ordinary certification and named-ballot access in the affected chamber. Passage of sufficient time restores that access as earlier service leaves the sixteen-year calculation.

Write-In Exception:
The constitutional threshold does not completely eliminate nomination or election eligibility. An otherwise qualified candidate may be certified as nominated or elected through write-in votes while the ordinary-access restriction remains applicable.

Nonstandard Service Integration:
The Constitution includes service the candidate would have completed absent resignation or recall. This counterfactual rule prevents either event from shortening the scheduled service history used in the rolling-window calculation.

Transition Architecture:
CI-64’s January 1993 term-beginning applicability rule supplies the governing prospective baseline. Article IV, §8(2) independently excludes terms ending during or before January 1993, and Attorney General Opinion 47-9 resolves conflicts between the two provisions in favor of the term-beginning rule.

Administrative Determinacy:
Official service dates, chamber histories, term schedules, candidate filings, resignation or recall records, and write-in results provide the information required to administer the architecture. Statutory implementation and Attorney General interpretation clarify when restored ordinary ballot access permits filing for a later term.

Revision Architecture:
The governing rule is constitutional. Citizen initiative and legislative referral provide amendment proposal pathways, statewide electors exercise adoption authority, and Article XIV supplies additional convention-based revision procedures.

Structural Validity finding:
Montana identifies the covered offices, rolling-window duration, chamber-specific aggregation rule, ordinary ballot-access consequence, write-in exception, counterfactual service treatment, transition boundary, restoration mechanism, and constitutional revision pathways. These elements provide a reproducible method for determining the operation of the restriction across time.

Normative Adequacy Assessment

Normative Adequacy examines Montana’s operative architecture across the independent dimensions of the Washington–Madison Doctrine. Each dimension identifies a distinct structural relationship.

1. Public Authorization Standard
Before the ordinary named-ballot threshold is reached, eight continuous years can involve four House elections at two-year intervals or two Senate elections at four-year intervals. The write-in exception preserves an additional electoral authorization pathway during the period in which ordinary certification and named-ballot access are restricted.

2. Duration Architecture
Article IV, §8 measures eight years of service within a rolling sixteen-year period. The threshold does not establish a lifetime or permanent service-duration endpoint. Earlier service can age out of the calculation, and write-in election can permit additional service while the ordinary ballot restriction remains applicable.

3. Equal-Duration Limit
The House and Senate use the same eight-years-in-sixteen threshold for ordinary certification and named-ballot access. Their different term lengths produce different authorization frequencies, while the write-in pathway and rolling restoration mean that neither chamber has a fixed lifetime maximum duration.

4. Equal Application
The same chamber-specific rolling-window calculation, counterfactual resignation-and-recall rule, transition provision, and write-in exception apply to candidates governed by Article IV, §8.

5. Eligibility Endpoint Architecture
Reaching the eight-years-in-sixteen threshold does not completely exhaust legal eligibility for the office. It restricts ordinary certification and named-ballot access, while Article IV, §8(3) preserves certification through write-in votes for an otherwise qualified candidate. Ordinary ballot access later returns as sufficient prior service leaves the rolling window.

6. Nonstandard Service Integration
The constitutional calculation includes service the candidate would have completed absent resignation or recall. The rule therefore prevents those events from shortening the scheduled service history used in the rolling-window calculation.

7. Transition Architecture
The original initiative applied the architecture to terms beginning during or after January 1993. The codified Constitution separately excludes service in terms ending during or before that date, while Attorney General Opinion 47-9 supplies the controlling interpretation where the provisions conflict.

8. Civic Intelligibility
“Eight years in any sixteen-year period” supplies a concise description of the principal numerical rule. Complete application additionally requires chamber-specific service history, rolling-window calculation, the end-of-term assessment, counterfactual service following resignation or recall, and the write-in exception.

9. Public Representation Integrity
The named-ballot restriction changes the ordinary candidate-access pathway after the threshold is reached. The write-in exception preserves a separate electoral pathway through which voters may nominate or elect the affected candidate.

10. Disruptive Capacity and Interruption Reach
The architecture can produce interruption when ordinary ballot access closes and no successful write-in candidacy occurs. Separate chamber calculations permit movement to the other chamber, while write-in election can preserve service in the same chamber and passage of time can later restore ordinary ballot access.

11. Authority Redistribution
Formal legislative authority transfers when another candidate succeeds to the seat. Because the constitutional threshold does not completely foreclose nomination or election, write-in authorization can preserve the same officeholder’s authority, and later rolling-window restoration can return ordinary ballot access.

12. Operational Determinacy and Implementation Authority
Official service histories, chamber identity, term schedules, resignation or recall history, and the sixteen-year calculation supply the principal inputs for administration. Statutory implementation and Attorney General interpretation establish that filing is permitted when the required interval will be complete by the beginning of the term sought.

13. Revision Architecture
The governing limits are constitutional. Citizen initiative, legislative proposal, and constitutional-convention procedures provide authorized routes for constitutional revision, with voter ratification completing the amendment process.

14. Prescribed Interruption and Renewal Opportunity
The rolling window creates a temporal pathway back to ordinary certification and named-ballot access as prior service leaves the calculation. It does not require a universal legislative interruption because the write-in exception remains available and the other chamber has a separate calculation.

Normative Adequacy finding:

Montana combines equal chamber-specific rolling-window thresholds, recurrent electoral authorization, temporal restoration of ordinary ballot access, chamber-specific aggregation, a counterfactual service rule, and voter-controlled constitutional revision.

Its complete architecture also preserves write-in nomination and election during the ordinary ballot restriction, permits chamber movement through separate service calculations, and leaves cumulative legislative duration without a permanent legislature-wide endpoint.

Realized effects on legislative succession, chamber movement, write-in candidacies, return patterns, electoral competition, leadership development, institutional knowledge, staff authority, and public confidence remain subjects for empirical observation.

Integrated Synthesis

Montana operates through a chamber-specific rolling-window ballot-access architecture. Article IV, §8 measures whether, by the end of the relevant term, a candidate will have served eight or more years in the office within a sixteen-year period.

House and Senate service remain in separate calculations. Eight continuous House years ordinarily consist of four two-year terms, while eight continuous Senate years ordinarily consist of two four-year terms. Movement between chambers therefore does not carry service from the first chamber into the rolling-window calculation of the second.

Reaching the threshold restricts ordinary certification and named-ballot access rather than completely exhausting eligibility for the office. Article IV, §8(3) preserves certification through write-in votes for an otherwise qualified candidate. Montana consequently maintains a separate electoral authorization pathway during the period in which ordinary ballot access is restricted.

Ordinary ballot access also returns through operation of the rolling window. As earlier service moves outside the sixteen-year period, the amount remaining within the calculation declines. A person completing eight continuous years ordinarily regains ordinary ballot access after an eight-year interval, although write-in election can permit additional service before that restoration occurs.

The architecture incorporates scheduled service that would have been completed absent resignation or recall. Its original transition used a prospective term applicability rule. CI-64 applied the architecture to terms beginning during or after January 1993, while Article IV, §8(2) separately excluded service in terms ending during or before that date; Attorney General Opinion 47-9 reconciled the provisions where their application could conflict.

Montana therefore combines equal chamber-specific duration thresholds, differentiated election frequencies, rolling restoration of ordinary ballot access, independent chamber calculations, counterfactual service counting, and an express write-in pathway. These features permit recurring legislative service without establishing a permanent chamber-specific or legislature-wide lifetime endpoint.

Realized effects on legislative succession, chamber movement, write-in candidacies, return patterns, electoral competition, leadership development, institutional knowledge, staff authority, and public confidence remain subjects for empirical observation.

Analytical Note — Ballot-Access Restriction and Write-In Reauthorization

Montana’s constitutional text separates ordinary ballot access from complete eligibility for legislative office.

Article IV, §8 directs election officials not to certify a candidate’s nomination or election through the ordinary process or place the candidate’s name on the ballot when the eight-years-in-sixteen threshold applies. Subsection (3), however, expressly preserves certification as nominated or elected through write-in votes for an otherwise qualified candidate.

The threshold therefore does not operate as a non-restorable eligibility endpoint. Instead, Montana combines a temporary restriction on the ordinary ballot pathway with continued electoral availability through write-in votes.

Two distinct mechanisms can support later or continued service:

Write-in electoral reauthorization:
Voters may nominate or elect the affected candidate through write-in votes while the ordinary ballot restriction remains applicable.

Temporal restoration of ordinary ballot access:
As earlier service moves outside the sixteen-year window, the rolling calculation can again fall below the constitutional threshold, restoring access to ordinary certification and the printed ballot.

Neither mechanism resets legislative history. The write-in pathway operates while the rolling calculation continues, and ordinary access returns because prior service has aged outside the governing window.

Montana therefore illustrates an architecture in which a temporal eligibility-related restriction changes the method of electoral authorization without completely removing the affected person from the legally available candidate class.

Related Pages

→ State Legislative Term Limits
Comparative state architectures place Montana among operative legislative systems using a chamber-specific rolling window rather than permanent lifetime exhaustion.

→ Term-Limit Comparator
Montana’s rolling-window ballot-access regime, temporal restoration, separate chamber calculations, and write-in exception can be compared with other documented eligibility architectures.

→ Architectural Classification
Rolling-window measurement, chamber-specific aggregation, ordinary ballot-access restriction, restoration, and the write-in exception define Montana’s operative architecture.

→ Transition Architecture
Montana’s prospective term-beginning applicability rule shows how the new rolling-window architecture incorporated incumbents without creating a separate legacy cohort.

→ Rotation Logic
Temporal restoration and continued write-in availability distinguish Montana’s recurring service pathways from architectures requiring complete interruption before renewed eligibility.

Last updated — September 2026