Proposition 135
BALLOT LANGUAGE
WHAT IT MEANS
Yes
No
ARGUMENTS FOR AND AGAINST
Yes
“An Irreversible Child Surgery. It's irreversible. It's robbing a child of a reproductive future. It needs to wait. Our ballot measure prohibits irreversible sex change surgeries on minor children, age 17 and younger. We set age limits on many things in Colorado — from voting, to drinking, to signing a contract. It's too early. For something this serious and permanent, let's wait until age 18.” - Protect Kids Colorado
“Children should be safeguarded from making irreversible decisions about their reproductive future. This citizen initiative prohibits irreversible sex-change surgeries for anyone under the age of 18.” - Focus on the Family
“Initiative #110 includes the "Protect Children from Irreversible Sex Change Surgery Act," which recognizes that minors lack the maturity to make "permanent, life-altering medical decisions" and that medical interventions and surgery intended to alter a child's biological sex often result in severe, irreversible consequences and even sterility. Initiative #110 also prohibits medical providers from knowingly performing, prescribing, or administering a medical intervention or surgery on a minor with the intent to alter their biological sex and prohibits state funding from being used for such medical interventions or surgeries. According to Declaration of the Dicastery for the Doctrine of the Faith 'Dignitas Infinita’ on Human Dignity (2024), "any sex-change intervention, as a rule, risks threatening the unique dignity the person has received from the moment of conception.” The Catechism of the Catholic Church recognizes that "the human body shares in the dignity of 'the image of God" (CCC 364), including the body's unique biological sex. The fundamental order of the human person is the unity of body and soul and attempts to alter biological sex are contrary to God's divine plan for that person. This is why the Church emphasizes the need to respect the natural order of the human person, especially of children whose physical and mental well-being will be seriously harmed by permanent and life-altering medical interventions and surgeries...” - Colorado Catholic Conference
No
"This measure takes healthcare decisions out of parents’ and doctors’ hands, with no way to appeal if the government gets it wrong. This measure could also interfere with medically necessary care for serious conditions that affect kids well beyond transgender youth.
Families along with their doctors — including mental health professionals — should have the freedom to decide what is best for their child.” - Families Not Politics
"Proposition 135 would restrict parents' access to age-appropriate, gender-affirming healthcare for their own children, giving the government more power over what care is available than parents and doctors.
Its language is vague and reaches further than it lets on, potentially removing access to even mental health support, not just the specific procedures it names. The measure's list of affected providers includes mental health providers, pharmacists, dentists, and acupuncturists.” - Hands Off Colorado
"Families, with the doctors and medical professionals they trust, should have the freedom to decide what health care is right for their child. This ban takes that choice away and puts the government in the middle of private family decisions. We trust families to make private medical decisions for their children without government interference.
The measure’s defined terms are vague and lead to unintended consequences for young people. For example, this measure could keep minors from receiving life-saving treatment for cervical or testicular cancers.
The measure distracts from real priorities like keeping kids healthy and safe while undermining Colorado’s law that already protects access to necessary medical care.
The measure undermines medical best practices that are supported by every major American medical association and proven to improve health outcomes and reduce suicide risk.” - League of Women Voters of Colorado
ENDORSEMENTS
Yes
Kevin Lundberg (Conservative)
Liberty Counsel Action (Conservative)
Independence Institute (Conservative)
Colorado Catholic Conference (Conservative)
Protect Kids Colorado (Conservative)
No
Colorado AFL-CIO (Liberal)
Cobalt Advocates (Liberal)
One Colorado (Liberal)
Steve Fenberg (Liberal)
Colorado Education Association (Liberal)
FINANCIAL BACKING
The following information provides insight into the money being spent to pass or defeat the ballot measure.
Yes
This question is on the ballot in Colorado as an initiated state statute on November 3, 2026. As of September 18, 2026, the committees formed to support Colorado Proposition 135, Prohibit Surgeries for Treatment in Response to Minors' Perception of Sex or Gender Measure (2026) are:
Selected contributions to: "Protect Kids Colorado" include:
- Protect Kids Colorado, 501(c)4
- Pikes Peak Citizens for Life
- Truth and Liberty Foundation
- Gayle Neidert
- Andrew Wommack Ministries, Inc.
- Terry Medearis
Selected contributions to: "Protect Our Children" include:
As of September 18, 2026, there are no contributions to report.
No
This question is on the ballot in Colorado as an initiated state statute on November 3, 2026. As of September 18, 2026, the committees formed to oppose Colorado Proposition 135, Prohibit Surgeries for Treatment in Response to Minors' Perception of Sex or Gender Measure (2026) are:
Selected contributions to: "The People’s No" include:
As of September 18, 2026, there are no contributions to report.
Selected contributions to: "Families not Politics" include:
- Planned Parenthood
- American Civil Liberties Union
- ACLU of Colorado
- One Colorado Education Fund
- Cobalt Advocates
- Advocates For Trans Equality
- Boulder Pride
- Merle Chambers
- Rose Community Foundation
- Oregon Equal Rights for All
- Daniel Slichter
Selected contributions to: "No on 134 and 135" include:
- Denver Democratic Socialists of America
Selected contributions to: "Protect Trans Kids" include:
As of September 18, 2026, there are no contributions to report.
Selected contributions to: "Vote Common Sense" include:
- Colorado Immigration Rights Coalition Action Fund
- Coloradans For Real Safety Solutions
- Cobalt Foundation
- AFSCME