House Joint Resolution L proposes an amendment to the Michigan state constitution to establish regulations regarding eligibility for participation in athletic events based on sex and related characteristics. Specifically, it stipulates that eligibility may be determined by the biological sex of participants, defined as either female or male as identified at birth, and explicitly states that gender identity or any procedures that alter sex characteristics to align with gender identity should not influence eligibility.

The resolution allows individuals to seek legal action for enforcement of this provision, including 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 proposed amendment will be presented to the voters of Michigan at the next general election for approval.