Restoration of leave— Any leave lost by an employee during a pandemic declared to be a nationwide public health emergency under section 319 of the Public Health Service Act (
42 U.S.C. 247d) because the amount of the leave accumulated by the employee would have been in excess of the maximum amount that may be accumulated by the employee under any provision of law or policy (including under section 6304 of title 5, United States Code) shall be restored to the employee.