Under the terms of the treaty the cities of Panama and Colon are required to comply in perpetuity with all sanitary ordinances, whether curative or preventive, which the United States may promulgate. The Republic of Panama also agrees that if it can not enforce these ordinances, the United States become vested with the power to enforce them. The same is true with reference to the maintenance of order. The Republic of Panama agrees to maintain order, but gives to the United States not only the right to step in with American forces and restore it, but also to determine when such action is necessary. The treaty between the two countries further provides that the United States has the right to acquire by condemnation any property it may need for canal purposes in the cities of Panama and Colon. The Republic of Panama also grants to the United States all rights it has or may acquire to the property of the New Panama Canal Company and of the Panama Railroad, except such lands as lie outside of the Canal Zone and the cities of Panama and Colon, not needed for the purposes of building the canal. The Republic guarantees to the United States every title as absolute and free from any present or reversionary interest or claim. It will be seen from all this that the United States did not overlook any opportunity to make sure that it had all of the powers necessary to build a canal. It is also agreed by the Panama Government that no dues of any kind ever shall be collected by it from vessels passing through or using the canal, or from vessels belonging to the United States Government. All employees of the canal are exempted from taxation, whether living inside or outside the Zone. The Republic grants to the United States the use of all its rivers, streams, lakes, and other bodies of water for purposes of navigation, water supply, and other needs of the canal. It also agrees to sell or lease to the United States any of its lands on either coast for use for naval bases or coaling stations. The Republic of Panama further agrees that the United States shall have the right to import commodities for the use of the Canal Commission and its employees, free of charge, and that it shall have the right to bring laborers of any nationality into the Canal Zone. In return for all of these concessions the United States gives to the Republic of Panama many valuable considerations. Most vital of all, it guarantees the independence of the Republic. This means that the Republic of Panama is today practically the possessor of an army and a navy as large as the United States can put into the field and upon the seas. The only aggressor that Panama need fear is her benefactor.