President Joe Biden has the same authority to impose a COVID-19 vaccine requirement on federal workers that private employers have for their employees, an administration lawyer told a federal appeals court Tuesday.

A lawyer for opponents of the vaccine requirement, which has been blocked nationwide by a federal judge in Texas, said the requirement imposes an “unconstitutionally intolerable choice” for executive branch workers — taking a vaccine they don’t want or losing their jobs.

Judges on the appeals court meanwhile questioned how far the chief executive’s authority goes, asking, theoretically, whether the president could require employees to meet certain healthy body weights or forbid them from smoking at home.

It was the second time arguments on the issue were heard before the 5th U.S. Circuit Court of Appeals. A three-judge panel of the same court had upheld the Biden requirement for executive branch workers, overturning the Texas judge.

But the full appeals court, currently with 16 active members, vacated the panel ruling and agreed to rehear the case. There was no indication when the court would rule.

Administration lawyers argue that the employees opposing the mandate should have taken their objections not to federal court but to a federal review board, in accordance with the Civil Service Reform Act. The administration also argues that the president has the same authority, under the Constitution, as the CEO of a private corporation to require that employees be vaccinated.