235 priate authority of the State or Territory, Puerto Rico, the Canal Zone, or the District of Columbia of whose Army National Guard he is a member. (d) The Secretary may require, as a condition of a detail under subsection (a), that an enlisted member accept a discharge and be reenlisted in his component for at least three years. (e) The total length of details of an enlisted member of the Army under subsection (a) during one enlistment may not exceed 50 percent of that enlistment. (f) At no time may more than 8 percent of the authorized strength in commissioned officers, 8 percent of the authorized strength in warrant officers, or 2 percent of the authorized strength in enlisted members, of the Regular Army, or more than 8 percent of the actual strength in commissioned officers, 8 percent of the actual strength in warrant officers, or 2 percent of the actual strength in enlisted members, of the total of reserve components of the Army, be detailed as students under subsection (a). For the purposes of this subsection, the actual strength of each category of Reserves includes both members on active duty and those not on active duty. (g) Expenses incident to the detail of members under this section shall be paid from any funds appropriated for the Department of the Army. §4302. Enlisted members of Army: schools (a) So far as consistent with the requirements of military training and service, and under regulations to be prescribed by the Secretary of the Army with the approval of the President, enlisted members of the Army shall be permitted to study and receive instruction to increase their military efficiency and to enable them to return to civilian life better equipped for industrial, commercial, and business occupations. Part of this instruction may be vocational education in agriculture or the mechanic arts. Civilian teachers may be employed to aid Army officers in this instruction. (b) Schools for the instruction of enlisted members of the Army in the common branches of education, including United States history, shall be maintained at all posts at which members of the Army are stationed. The Secretary may detail members of the Army to carry out this subsection. The commander of each post where schools are maintained under this subsection shall provide a suitable room or building for school and religious purposes. § 4306. Service schools: leaves of absence for instructors The officer in charge of an Army service school may grant a leave of absence for the period of the suspension of the ordinary academic studies, without reduction of pay or allowances, to any officer on duty exclusively as an instructor at the school. §4307. Director of civilian markmanship: detail The President may detail a commissioned officer of the Army or of the Marine Corps as director of civilian marksmanship, to serve under the direction of the Secretary of the Army.