S. 1988 would prohibit males from participating in athletic programs and competitions officially designated for women or girls at the three major U.S. military service academies—the Military Academy (West Point), Naval Academy, and Air Force Academy. The bill, introduced by Senator Tuberville in June 2025, directs the Secretary of Defense to enforce this prohibition. The legislation includes an exception allowing males to train or practice with women's teams as long as no female athlete loses a roster spot, scholarship, playing time, or any other athletic benefit. The bill defines "sex" based on a person's reproductive biology and genetics at birth. No specific funding or implementation timeline is included in the legislation.