From the New York Post [caution, tabloid]:
President Donald Trump on his first day in office Monday will issue an order defining a person’s sex as “male or female” — requiring government agencies to use the “immutable” designation on forms and IDs while also ordering changes to federal prison policies that govern transgender inmates.
“What we’re doing today is defining that it is the policy of the United States to recognize two sexes: male and female. These are sexes that are not changeable, and they are grounded in fundamental and incontrovertible reality,” an incoming White House official told reporters. The policies are included in an executive order — one of dozens that Trump, 78, is expected to sign shortly after he assumes the presidency around noon.