Any person subject to this chapter who, with intent to defraud- –
(1) falsely makes or alters any signature, to, or any part of, any writing which would, if genuine, apparently impose a legal liability on another or change his legal right or liability to his prejudice; or
(2) utters, offers, issues, or transfers such a writing, known by him to be so made or altered;
is guilty of forgery and shall be punished as a court-martial may direct.