Except as hereinafter provided, each college, community college, or school in this state in which there is not maintained a J.R.O.T.C. or R.O.T.C. unit may establish a California Cadet Corps company or companies under the rules and regulations as the governing body of the schools and the Adjutant General may prescribe. A California Cadet Corps company or companies shall be of such strength as shall be prescribed by the Adjutant
General. A California Cadet Corps company or companies is not required to be established in a school, college, or community college unless a number of qualified students sufficient to constitute a company or companies of the strength prescribed by the Adjutant General voluntarily enroll therein.