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necessary for efficient management, operation, and maintenance, and effective protection and defense of the Canal.
(b) The United States shall have the right to use and maintain the existing installations, including the 44KV electrical transmission lines and towers, and to construct, use and maintain additional installations along the Railroad right of way, and may have access thereto for such purposes.
(c) The Republic of Panama-'shall permit the
United States to use the Railroad and its equipment, on a priority basis, for the purposes of maintaining such transmission lines and other installations, and of transporting equipment, supplies and personnel related to the management, operation, maintenance, or protection and defense of the Canal. The United States shall pay the costs resulting from such use in accordance with rates which shall not exceed those charged by the Railroad to its most favored customer on a commercial basis.
(d) Spur tracks, sidings and related equipment serving the installations in areas made available to the United States pursuant to the Panama Canal Treaty shall remain the responsibility of the United States. Railroad access to such trackage shall be subject to the approval of the responsible United States authorities.
(e) If the Republic of Panama decides, at any time, that its continued operation of the Railroad at the minimum levels of service agreed upon by the two Parties is no longer viable, the United States shall have the right to reassume management and operation of the Railroad.

TIAS 10031