Any three years of continuous active service after 10 December 1945, regardless of expiration or extension of enlistments and any previous or subsequent disciplinary action, except as indicated in subparagraph (b) for enlisted personnel, Regular or Reserve, including service in temporary warrant or temporary commissioned status, provided such temporary officer reverts to enlisted status. Also, if reenlisted within a period of 90 days from date of discharge, it will not be construed as an interruption of continuous service, but the period between discharge and reenlistment will not be counted.