104 STAT. 1388-384 PUBLIC LAW 101-508—NOV. 5, 1990 and the Secretary shall transmit to Congress an annual report on the progress being made toward such compliance. (h) DEFINITIONS.—As used in this section, the following definitions apply: (1) AIR CARRIER; AIR TRANSPORTATION; UNITED STATES. —The terms "air carrier", "air transportation", and "United States" have the meanings such terms have under section 101 of the Federal Aviation Act of 1958. (2) STAGE 3 NOISE LEVELS.— The term "Stage 3 noise levels" means the Stage 3 noise levels set forth in part 36 of title 14, Code of Federal Regulations, as in effect on the date of the enactment of this Act. 49 USC app. SEC. 9309. NONADDITION RULE. (a) GENERAL RULE. —Except as provided iii subsection (b) of this section, no person may operate a civil subsonic turbojet aircraft with a msiximum weight of more than 75,000 pounds which is imported into the United States on or after the date of the enactment of this Act unless— (1) it complies with the Stage 3 noise levels, or (2) it was purchased by the person who imports the aircrgift into the United States under a written contract executed before such date of enactment. (b) EXEMPTION FOR COMPLYING MODIFICATIONS. — The Secretary may provide an exemption from the requirements of subsection (a) to permit a person to obtain modifications to an aircraft to meet the - Stage 3 noise levels. (c) LIMITATION ON STATUTORY CONSTRUCTION. — For the purposes of this section, an aircraft shall not be considered to have been imported into the United States if such aircraft— (1) on the date of the enactment of this Act, is owned— (A) by a corporation, trust, or partnership which is organized under the laws of the United States or any State (including the District of Columbia); (B) by an individual who is a citizen of the United States; or (C) by any entity which is owned or controlled by a corporation, trust, partnership, or individual described in this paragraph; and (2) enters into the United States not later than 6 months after the date of the expiration of a lease agreement (including any extensions thereof) between an owner described in paragraph (1) and a foreign air carrier.