10 USC 2271 – Management of space programs: joint program offices and officer management programs
(a)
(b)
(A) Army, Navy, and Marine Corps officers, as well as Air Force officers, are assigned to the space development and acquisition programs of the Department of Defense; and
(B) Army, Navy, and Marine Corps officers, as well as Air Force officers, are eligible, on the basis of qualification, to hold leadership positions within the joint program offices referred to in subsection (a).
(2) The Secretary of Defense shall designate those positions in the Office of the National Security Space Architect of the Department of Defense (or any successor office) that qualify as joint duty assignment positions for purposes of chapter 38 of this title.