(a) It shall be the duty of every alien now or hereafter in the United States, who (1) is fourteen years of age or older, (2) has not been registered and fingerprinted under section 1201(b) of this title or section 30 or 31 of the Alien Registration Act, 1940, and (3) remains in the United States for thirty days or longer, to apply for registration and to be fingerprinted before the expiration of such thirty days. (b) It shall be the duty of every parent or legal guardian of any alien now or hereafter