107 STAT. 1578 PUBLIC LAW 103-160—NOV. 30, 1993 (2) With the agreement of the National Academy of Sciences and the National Academy of Public Administration, the study shall be conducted jointly by those organizations. (3) Of the amounts authorized to be appropriated to the Department of Defense for fiscal year 1994 and made available for procurement of Global Positioning System user equipment, for procurement of spacecraft, or for operations and maintenance, up to $3,000,000 may be used for carrying out the study required by paragraph (1). (b) LIMITATION ON PROCUREMENT OF SYSTEMS NOT GPS- EQUIPPED.— After September 30, 2000, funds may not be obligated to modify or procure any Department of Defense aircraft, ship, armored vehicle, or indirect-fire weapon system that is not equipped with a Global Positioning System receiver. (c) REPORT.— (1) Not later than May 1, 1994, the Secretary of Defense shall submit to the committees specified in paragraph (3) a report on the Global Positioning System. The report shall include a description of each of the following: (A) The threats, if any, to the health and safety of United States military forces, allied military forces, and the United States and allied civilian populations, and the threats, if any, of damage to property within the United States and allied countries, that will result by the year 2000 from Global Positioning System navigation signals, local and wide-area dif- ferential navigation correction signals, kinematic differential correction signals, and commercially available map products based on the Global Positioning System. (B) The threat, if any, to civil aviation and other transportation operations that will result by the year 2000 from the signal jamming, deception, and other disruptive effects of Global Positioning System navigation signals. (C) The actions, if any, that can be taken to eliminate or mitigate such threats. (D) The modifications, if any, of the Global Positioning System and derivative systems that can be made to eliminate or significantly reduce such threats, or to increase the ability of the Department of Defense to mitigate such threats, without interfering with authorized and peaceful uses of the Global Positioning System. (2) The report under paragraph (1) shall be prepared in coordination with the Director of Central Intelligence. (3) The committees referred to in paragraph (1) are— (A) the Committee on Armed Services, the Committee on Appropriations, and the Permanent Select Committee on Intelligence of the House of Representatives; and (B) the Committee on Armed Services, the Committee on Appropriations, and the Select Committee on Intelligence of the Senate. SEC. 153. RING LASER GYRO NAVIGATION SYSTEMS. None of the funds appropriated for fiscal year 1993 or fiscal year 1994 for procurement for the Navy may be obligated or expended for the procurement of ring laser gyro navigation systems for surface ships under a sole-source contract. SEC. 154. OPERATIONAL SUPPORT AIRCRAFT. (a) LIMITATION. —None of the funds appropriated for the Department of Defense for fiscal year 1994 may be ooligated for a procure-
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