Details of President Trump’s ban on transgender Americans serving in the United States military are reportedly contained in a memo prepared by the White House, which will be presented to Secretary of Defense Jim Mattis sometime this week.

The rules as outlined in the memo will deny future enlistments to all transgender Americans, and give discretion to the Secretary of Defense to remove those currently serving. Central to the criteria in Secretary Mattis’ decision will be a service member’s ability to deploy to training, combat, or other deployment.

The memo also directs the Department of Defense to stop funding medical treatments related to gender transitions for transgender personnel already serving. The plan is to go into effect within the next six months. The memo was first reported on by the Wall Street Journal.

Details on the trans ban announced by the President over a month ago via Twitter have been non-existent, with the Department of Defense caught unaware of the President’s proposed ban and directing all questions regarding the policy back to the White House. In the interim, guidance from Chairman of the Joint Chiefs General Joseph Dunford has been to maintain the policy as established during the Obama administration, allowing transgender service members the ability to continue their service.