This regulation sets forth the authority, policy, responsibility, and procedures for the acquisition of real property and interests therein, for military purposes by the Department of the Army. This regulation does not apply to Civil Works Projects, which are under the supervision of the Chief of Engineers. While the Federal Government has the inherent power to acquire land for its constitutional purposes, this power can be exercised only at the discretion of Congress. No land will be purchased in the name of the United States except under a law authorizing such purchase. No military department may acquire real property not owned by the United States unless the acquisition is expressly authorized by law. Acts authorizing the Secretary of the Army to acquire real property and interests therein are outlined.