LINE was adopted by the Marine Corps in 1989 at a Course Content Review Board (CRB) at Quantico, Virginia. All techniques were demonstrated for and deemed medically feasible by the Armed Forces Medical Examiner (given a single attack opponent) and a board of forensic pathologists from the Armed Forces Institute of Pathology (AFIP) in 1991. LINE was replaced by the Marine Corps Martial Arts Program (MCMAP) by Marine Corps Order 1500.54, published in 2002, although it had been actually dropped in 1998, as a "revolutionary step in the development of martial arts skills for Marines and replaces all other close-combat related systems preceding its introduction." Military combatives instruction programs—and the contracts awarded for it—are undertaken through a system of competition, in which the systems are compared by review boards, and presented by individual subject matter experts. Review boards may, from time to time, choose one system over another, based on the changing needs of the Marine Corps or other military service. In the case of LINE Combatives, the system was repeatedly reviewed and approved for training by many units over more than two decades. LINE Combatives continues to be one of only two systems reviewed and consulted upon by specially tasked and appointed boards of military medical examiners.