PUBLIC LAWS-CH. 247-MAY 2, 1946 expended, all moneys received by the Panama Canal during the fiscal year 1947 and prior fiscal years (exclusive of net profits for such prior fiscal years) from services rendered or materials and supplies fur- nished to the United States, the Panama Railroad Company, the Canal Zone government, or to their employees, respectively, or to the Panama Government, from hotel and hospital supplies and services; from rentals, wharfage, and like service; from labor, materials, and supplies and other services furnished to vessels other than those passing through the Canal, and to others unable to obtain the same elsewhere; from the sale of scrap and other byproducts of manufacturing and shop operations; from the sale of obsolete and unserviceable materials, supplies, and equipment purchased or acquired for the operation, maintenance, protection, sanitation, and government of the Canal and Net profits. Canal Zone; and any net profits accruing from such business to the Panama Canal shall annually be covered into the Treasury of the United States. Waterworks, etc., There is also made available for the fiscal year 1947 for the oper- ation, maintenance, and extension of waterworks, sewers, and pave- ments in the cities of Panama and Colon, to remain available until expended, the necessary portions of such sums as shall be paid during that fiscal year as water rentals or directly by the Government of Panama for such expenses; and notwithstanding the transfer of the waterworks and sewer systems pursuant to the joint resolution 57Stat. 7 approved May 3, 1943 (Public Law 48), any unexpended balances of the sums made available by this paragraph, together with the unexpended balances of sums heretofore made available for the same purpose in prior fiscal years, shall be immediately available and shall remain available until expended for the purposes for which they were made available. Canal Zone. SEC. 2. No part of any appropriation contained in this Act shall be Citizenship require- ment. used directly or indirectly, except for temporary employment in case of emergency, for the payment of any civilian for services rendered by him on the Canal Zone while occupying a skilled, technical, clerical, administrative, executive, or supervisory position unless such person is a citizen of the United States of America or of the Republic of Employment of Panama: Provided, however, (1) That, notwithstanding the pro- 48U.S.C. 1 307 vision in the Act approved Augst 11, 1939 (53 Stat. 1409), limiting note. gu emnployment in the above-nlentioned positions to citizens of the United States from and after the date of the approval of said Act, Limitation. citizens of Panaina may be employed in suclh positions; (2) that at no time shall the number of Panamanian citizens employed in the above-mentioned positions exceed the number of citizens of the United States so employed, if United States citizens are available in Employees with 15 continental United States or on the Canal Zone: (3) that nothing yearsofservice. in this Act shall prohibit the continued employment of any person who shall have rendered fifteen or more years of faithful and hon- Selection of person- orable service on the Canal Zone; (4) that in the selection of per- nel. sonnel for skilled, technical, administrative, clerical, supervisory, or executive positions, the controlling factors in filling these positions nours of employ- shall be efficiency, experience, training, and education; (5) that all citizens of Panama and the United States rendering skilled, technical, clerical, administrative, executive, or supervisory service on the Canal Zone under the terms of this Act (a) shall normally be employed not more than forty hours per week, (b) may receive as compensa- tion equal rates of pay based upon rates paid for similar employ- Applicability. ment in continental United States plus 25 per centum; (6) this entire section shall apply only to persons employed in skilled, tech- nical clerical, administrative, executive, or supervisory positions on the Canal Zone directly or indirectly by any branch of the United 166 [60 STAT.