Statewide ballot measure
Proposition 134 (Initiative 109): Designating school sports teams by biological sex
On the November 3, 2026 ballot
- Ballot number
- Proposition 134
- Filed as
- Initiative 109
- Type of measure (Legislative Council)
- Statutory
The ballot question
Shall there be a change to the Colorado Revised Statutes creating new law restricting participation in all K-12 and collegiate school sports based on the participant’s sex as determined by certain aspects of their biological reproductive system, and, in connection therewith, requiring a school, institution of higher education, or athletic association to designate each school or intramural athletic team or sport as male, female, or coeducational; only allowing participants to compete on the team or sport of their designated sex or to compete on a coeducational team; creating an exception to allow a female to participate on a male-designated team or sport if there is no female team available; prohibiting a government entity, licensing or accrediting organization, or athletic association from entertaining a complaint, opening an investigation, or taking other adverse action against a school for maintaining separate teams or sports for females; and providing the commissioner of education with the authority to enforce the proposed initiative for K-12 school districts?
What a vote does
- A yes vote means
- The measure would require school and athletic-association sports teams to be designated male, female or coeducational based on biological sex. Male students could not join female teams. Female students could join male teams only when no female team in that sport is offered or available to them. An individual born with a diagnosis of a disorder or difference in sex development would retain all legal protections and accommodations under federal law, despite any other provision of the measure.
- A no vote means
- Current law would remain in effect. The measure’s team-designation requirements, participation restrictions and school-policy duties would not take effect.
Figures from the fiscal estimate
- Takes effect: January 1, 2027
- TABOR refunds: No change
- Estimated for fiscal years 2026–27 and 2027–28.
- Added state appropriations: $0 estimated
- Fiscal years 2026–27 and 2027–28. Assumes district compliance and minimal enforcement costs; colleges would use institutional revenue for policy changes.
Legislative Council ballot analysis
Official documents
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Key dates
- October 2 to October 9: county clerks mail ballots to active voters.
- October 12: drop boxes open.
- October 26: last suggested day to return a ballot by mail.
- From October 27: return your ballot to a drop box or vote center instead of mailing it.
- November 3, 2026, Election Day: ballots are due by 7:00 p.m.
Page updated September 29, 2026