41 When the order and discipline referred to in this paragraph should be breached by members of the Forces outside the defense sites, and the authorities of the Republic of Panama, for ritasons of language differences or other circumstances, consider it convenient, they may request the presence of personnel of the police of the United States Forces to cooperate in the reestablishment of order and discipline, and, in such cases, the United States Forces shall be obliged to send them. Within the defense sites, the police function shall be primarily exercised by the police of the United States Forces. The Panamanian authorities shall cooperate with the United States Forces in the fulfillment of this function, for which purpose they may locate members of the Panamanian police within the defense sites at the headquarters of the police of the United States Forces or as the Joint Committee agrees. Such cooperation shall be rendered particularly in those cases involving Panamanian nationals. The Joint Committee may also agree on a procedure so that members of the Panamanian police and the police of the United States Forces may jointly conduct routine inspections for the maintenance of order and discipline in those places where vigilance is especially required. (4) The United States Forces shall restrict, to the maximum extent possible, the wearing of military uniforms so that they will be worn only when necessary. The Joint Committee shall adopt standards regarding the wearing of military uniforms in other cases, as exceptions. ARTICLE XXII Duration This Agreement shall enter into force when the Panama Canal Treaty signed on this date enters into force['1and shall terminate at noon, Panama time, on December 31, 1999. Oct. 1, 1979. TIAS 10032