Cal. MVC § 530

In any military academy, having not less than 80 students, uniformed, drilled, and instructed in strict accordance with the tactics of the regular United States Army, and in which the instruction is conducted in accordance with military principles, the military instructor or instructors or professors of military science and tactics of the academy regularly elected or appointed by the board of trustees or other lawful authority of the academy, may be commissioned in the California Cadet Corps with the rank of major or lower rank. Such officers shall not exercise authority or command except as military instructor or instructors or professors of military science and tactics of such academy. The commissions shall be granted and may be revoked by the Adjutant General, under such rules and regulations as they may prescribe.