Newly arrived candidates from Alpha Company, Officer Candidate School, check in to OCS aboard Marine Corps Base Quantico, Va., Thursday, May 28, 2009. A newly released MARADMIN details major changes coming to enlisted to officer commissioning programs. - Newly arrived candidates from Alpha Company, Officer Candidate School, check in to OCS aboard Marine Corps Base Quantico, Va., Thursday, May 28, 2009. A newly released MARADMIN details major changes coming to enlisted to officer commissioning programs.