The White House has announced a new policy that bans most transgender individuals from serving in the military, following through on President Trump’s promise in a July tweet.

Photo credit: US Army

The Trump administration has announced a new policy banning most transgender people from serving in the military, reversing the policy instated by Barack Obama.

According to a White House memo on the new policy, individuals with gender dysphoria will be “disqualified from military service except under certain limited circumstances.” Exceptions will include people who have been “stable for 36 consecutive months in their biological sex prior to accession,” people who “do not require a change of gender” and people who started their service under the previous policy.

The new policy, said White House Press Secretary Sarah Sanders, was “developed through extensive study by senior uniformed and civilian leaders, including combat veterans.”

“This new policy will enable the military to apply well-established mental and physical health standards – including those regarding the use of medical drugs – equally to all individuals who want to join and fight for the best military force the world has ever seen,” Sanders said.

LGBT advocacy groups slammed the new policy as discriminatory. “The Trump-Pence administration’s continued insistence on targeting our military families for discrimination is appalling, reckless, and unpatriotic,” said Ashley Broadway-Mack, who heads the American Military Partner Association.