Except as otherwise provided by law, no person except a member of the Army, Navy, Air Force, or Marine Corps, as the case may be, may wear— (1) the uniform, or a distinctive part of the uniform, of the Army, Navy, Air Force, or Marine Corps; or (2) a uniform any part of which is similar to a distinctive part of the uniform of the Army, Navy, Air Force, or Marine Corps. (Aug. 10, 1956, ch. 1041, 70A Stat. 34 .)