In order to be eligible for the Survivors Pension, a deceased veteran must have (1) served at least 90 days of active military service with at least one day during a war period on or before September 7, 1980, (2) was discharged from service under other than dishonorable conditions, and (3) must have served at least 24 months or the full period of active service with at least one day during a wartime period if he has entered active duty after September 7, 1980.