New Executive Order: Transgender Service Members lack "an honorable, truthful, and disciplined lifestyle." Being trans "is not consistent with the humility and selflessness required of a service member."
The actual implementation of this ban is left vague, however it leaves SecDef Hegseth 60 days to implement the ban as he sees fit. A total ban on all 15,000 currently serving trans SM's would amount to a loss of $18 Billion in invested capital according to SPARTA. Additionally this move would cost another $1 Billion to recruit and train replacements.
Welcome to Don't Ask Don't Tell 2.0.