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 52 STAT.] 75TH CONG., 3D SESS.- CH. 180 -APR. 27, 1938 INTERNATIONAL BOUNDARY COMMISSION, UNITED STATES AND MEXICO Salaries and expenses: For expenses of meeting the obligations of the United States under the treaties of 1884, 1889, 1905, 1906, and 1933 between the United States and Mexico, and of compliance with the Act approved August 19, 1935, as amended (49 Stat. 660, 1370), operation of gaging stations where necessary and their equipment; personal services and rent in the District of Columbia and elsewhere; fees for professional services at rates and in amounts to be determined by the Secretary of State; traveling expenses, including transporta- tion of effects; printing and binding; law books and books of refer- ence; subscriptions to foreign and domestic newspapers and period- icals; purchase, exchange, maintenance, repair, and operation of motor-propelled passenger- and freight-carrying vehicles; hire, with or without personal services, of work animals, and animal-drawn and motor-propelled vehicles and equipment; purchase of rubber boots and waders for official use of employees; purchase of ice i drilling and testing of dam sites, by contract if deemed necessary, without regard to section 3709 of the Revised Statutes (41 U. S. C . 5); equipment and such other miscellaneous expenses as the Secretary of State may deem proper, $143,300. Construction, operation, and maintenance, Public Works projects: For the construction (including surveys and operation and mainte- nance and protection during construction) of the following projects under the supervision of the International Boundary Commission, United States and Mexico, United States section, including salaries and wages of employees, laborers, and mechanics; fees for profes- sional services at rates and in amounts to be determined by the Secretary of State; travel expenses; rents; construction and operation of gaging stations; purchase (including exchange), maintenance, repair, and operation of motor-propelled passenger- and freight- carrying vehicles; drilling and testing of dam sites, by contract if deemed necessary, without regard to the provisions of section 3709 of the Revised Statutes (41 U. S. C . 5); hire, with or without personal services, of work animals and animal-drawn and motor-propelled vehicles and equipment; acquisition by donation, purchase, or con- demnation, of real and personal property, including expenses of abstracts and certificates of title; transportation of things (including drayage, packing, and crating of personal effects of employees upon change of station for permanent duty not to exceed five thousand pounds in any one case); printing and binding; communication serv- ices; equipment, materials and supplies, including purchase of ice, rubber boots, and waders for official use of employees, and such other miscellaneous expenses as the Secretary of State may deem necessary: Rio Grande rectification project: For completion of the rectifica- tion of the Rio Grande in the El Paso-Juarez Valley under the con- vention concluded February 1, 1933, between the United States and Mexico, $229,500, together with the unexpended balances of the appropriations for this purpose for the fiscal years 1936-1937 and 1938, all to be available immediately. Lower Rio Grande flood-controi project: For the United States portion of the project for flood control on the Lower Rio Grande, as authorized by the Act approved August 19, 1935, as amended (49 Stat. 660, 1370), $311,500, together with the unexpended balances of the appropriations for this purpose for the fiscal years 1936-1937 and 1938: Provided, That no part of this appropriation for the Lower Rio Grande flood-control project shall be expended for construction on any land, site, or easement until title thereto has been conveyed to the United States by donation and the same has been approved by the Attorney General of the United States. 255 International Boundary Commis- sion, United States and Mexico. 24 Stat. 1011; 26 Stat. 1512; 34 Stat. 2953; 49 Stat. 660, 1370. Printing and bind- ing. Vehicles. Testing dam sites. R. S. §3709. 41U. S.C. §5. Public Works proj- ects under Commis- sion. Vehicles. R. S. §3709. 41U. .C.i5. Printing and bind- ing. Rio Orande recti- fication project. 48 Stat. 1621. Balances available. 49 Stat. 1317; 50 Stat. 269. Lower Rio Orande flood-control project. 49 Stat. 660, 1370. Balances reappro- priated. 49 Stat. 1318; 50 Stat. 269. Provieo. Acquisition of title.

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