((a)) A member of the Army, Navy, Air Force, Marine Corps, Space Force, Coast Guard, or National Oceanic and Atmospheric Administration, who is absent because of sickness or wounds, or who is directed by the Secretary concerned, or the Secretary’s designated representative, to be absent from duty to await orders pending disability retirement proceedings for a period that is longer than the leave authorized by , is entitled to the pay and allowances to which the member would be entitled if the member were not so absent. A member who is absent with leave for any other reason for not longer than the leave authorized by that section is entitled to the same pay and allowances to which the member would be entitled if the member were not on leave, and to any additional allowances otherwise provided by law for members on leave.
((b)) Except as provided in subsection (a) and , a member who is authorized by the Secretary concerned, or the Secretary’s designated representative, to be absent for a period that is longer than the leave authorized by is not entitled to pay or allowances during the part of the member’s absence that is more than the number of days’ leave authorized by that section. Nothing in this subsection may be construed to deprive a member, detailed or assigned by the Secretary concerned as a full-time student at a civilian institution to pursue a program of education that is substantially the same as a program of education offered to civilians, of pay or allowances to which such member is entitled.