“All single-sex facilities in the Capitol and House Office Buildings — such as restrooms, changing rooms, and locker rooms — are reserved for individuals of that biological sex,” Johnson said in a statement on Wednesday. “It is important to note that each Member office has its own private restroom, and unisex restrooms are available throughout the Capitol.”

The policy comes after Rep. Nancy Mace (R-SC) introduced a resolution earlier this week targeting Rep.-elect Sarah McBride (D-DE), the first transgender member of Congress, from using bathrooms designated for female lawmakers and staffers in the Capitol building.

The policy applies to bathrooms in the Capitol and House office buildings and will be enforced by the House sergeant-at-arms. Although the means of enforcement are not clear, Johnson maintained it will be.

“Like all policies, it is enforceable,” Johnson told reporters. “It’s always been an unwritten policy, but now it’s in writing.”

It remains unclear what punishments could ensure if someone is found in violation of the policy. However, in the past, leadership has resorted to fining members, such as former House Speaker Nancy Pelosi (D-CA) setting up $5,000 fines for first offenses and $10,000 for second offenses for members who refused to walk through metal detectors after the Jan. 6, 2021, attack on the Capitol.