(a) The provisions in this subchapter are in addition to, and are not in lieu of, any other provisions of law or regulations. The sale of firearms in the United States, for example, remains subject to the provisions of the Gun Control Act of 1968 and regulations administered by the Department of Justice. The performance of defense services on behalf of foreign governments by retired military personnel continues to require consent pursuant to part 3a of this title. Persons who intend to export defense articles or furnish defense services should not assume that satisfying the requirements of this subchapter relieves one of other requirements of law.

(b) All determinations, authorizations, licenses, approvals of contracts and agreements, and other action issued, authorized, undertaken, or entered into by the Department of State pursuant to section 414 of the Mutual Security Act of 1954, as amended, or under the previous provisions of this subchapter, continue in full force and effect until or unless modified, revoked, or superseded by the Department of State.