House Joint Resolution L, introduced by Rep. Woolford on August 13, 2025, proposes an amendment to the Michigan state constitution to establish regulations regarding eligibility for participation in athletic events based on sex and related characteristics. The proposed amendment, which would add Section 29 to Article 1 of the constitution, stipulates that eligibility for athletic events conducted or funded by the state or its subdivisions, as well as by accrediting organizations or interscholastic athletic associations, may be determined by the biological sex of participants. It explicitly states that eligibility should not be influenced by gender identity or any procedures that alter sex characteristics to align with gender identity.

Additionally, the resolution allows individuals to take legal action to enforce this section, with the possibility of seeking declaratory, injunctive, or monetary relief in the circuit court of their county. If a plaintiff is successful in their case, the court is required to award reasonable attorney fees and costs. The amendment defines "sex" as the biological condition of being female or male as determined at birth. This proposed amendment will be submitted to the voters of Michigan during the next general election.