14 U.S.C. § 333 : US Code - Section 333: Relief of retired officer promoted while on active duty

Search 14 U.S.C. § 333 : US Code - Section 333: Relief of retired officer promoted while on active duty

Any regular officer on the retired list recalled to active duty
who during such active duty is advanced to a higher grade under an
appointment shall, upon relief from active duty, if his performance
of duty under such appointment has been satisfactory, be advanced
on the retired list to the highest grade held while on such active
duty.