Whether a group can serve openly determines who is eligible to volunteer for the roughly 1.3 million active-duty force and who can be discharged.
It means people in a certain group can join and stay in the military without hiding who they are.
Open service policies sit at the intersection of military readiness standards and broader debates over equal treatment under federal law.
Because the policy has changed repeatedly since 2016, service members and recruits face uncertainty about their long-term status.
The Defense Department issues regulations on accession (who can enlist) and retention (who can stay), typically aligned with the sitting president's direction.
Open service policies usually specify how medical care, including gender-transition-related care, interacts with deployability and fitness-for-duty rules.
Courts can pause or block changes to open service policies when lawsuits allege constitutional or statutory violations, as occurred in June 2026.
A look at how policy on transgender military service is set, how it has changed, and why a federal court is now involved.
Read the guide →A federal court ruling and shifting executive policies have renewed debate over whether transgender troops should be permitted to serve openly.
Read the brief →