MIL-STD-27733, DEPARTMENT OF DEFENSE STANDARD PRACTICE: MODIFICATION AND MARKING REQUIREMENTS FOR TEST EQUIPMENT IN AEROSPACE VEHICLES AND RELATED SUPPORT EQUIPMENT (18 MAY 1998)., This standard identifies marking, safety, and configuration controlpractices for temporary non-standard modifications on Department of Defense ownedaerospace vehicles, and related support equipment in support of research,development, test and evaluation.