((a)) Except as otherwise provided in this title, the Secretary concerned may at any time release a Reserve under his jurisdiction from active duty.

((b)) In time of war or of national emergency declared by Congress or the President after , a member of a reserve component may be released from active duty (other than for training) only if—

((1)) a board of officers convened at his request by an authority designated by the Secretary concerned recommends the release and the recommendation is approved;

((2)) the member does not request that a board be convened; or

((3)) his release is otherwise authorized by law.