10 U.S. Code § 10109 - Marine Corps Reserve: administration
The Marine Corps Reserve is the reserve component of the Marine Corps. It shall be organized, administered, trained, and supplied under the direction of the Commandant of the Marine Corps.
The departments and offices of Headquarters, Marine Corps have the same relation and responsibilities to the Marine Corps Reserve as they do to the Regular Marine Corps.
Provisions similar to those in this section were contained in section 5252(a), (b) of this title, prior to repeal by Pub. L. 103–337, § 1661(a)(3)(A).