54 STAT.] 76TH CONG. , 3D SESS.-CH. 415 -JUNE 24, 1940 Panama Canal), canalized river, or other public works for the use and benefit of navigation belonging to the United States, including maintenance of the Hennepin Canal in Illinois; for payment annu- ally of tuition fees of not to exceed fifty student officers of the Corps of Engineers at civil technical institutions under the provisions of section 127a of the National Defense Act, as amended (10 U. S . C. 535); for examinations, surveys, and contingencies of rivers and harbors; for printing and binding, newspapers, lawbooks, books of reference, periodicals, and office supplies and equipment required in the Office of the Chief of Engineers to carry out the purposes of this appropriation, including such printing as may be authorized by the Committee on Printing of the House of Representatives, either dur- ing a recess or session of Congress, of surveys authorized by law, and such surveys as may be printed during a recess of Congress shall be printed, with illustrations, as documents of the next succeeding session of Congress, and for the purchase (not to exceed $197,700) of motor-propelled passenger-carrying vehicles and motorboats for official use: Provided, That no part of this appropriation shall be expended for any preliminary examination, survey, project, or esti- mate not authorized by law, $67,365,310: Provided, That from this appropriation the Secretary of War may, in his discretion and on the recommendation of the Chief of Engineers based on the recom- mendation by the Board of Rivers and Harbors in the review of a report or reports authorized by law, expend such sums as may be necessary for the maintenance of harbor channels provided by a State, municipality, or other public agency, outside of harbor lines and serving essential needs of general commerce and navigation, such work to be subject to the conditions recommended by the Chief of Engineers in his report or reports thereon: Provided further, That no appropriation under the Corps of Engineers for the fiscal year 1941 shall be available for any expenses incident to operating any power-driven boat or vessel on other than Government business: Provided further, That not to exceed $3,000 of the amount herein appropriated shall be available for the support and maintenance of the Permanent International Commission of the Congresses of Navi- gation and for the payment of the actual expenses of the properly accredited delegates of the United States to the meeting of the congresses and of the commission. FLOOD CONTROL Flood control, general: For the construction and maintenance of certain public works on rivers and harbors for flood control, and for other purposes, in accordance with the provisions of the Flood Con- trol Act, approved June 22, 1936, as amended and supplemented, including printing and binding, newspapers, law books, books of refer- ence, periodicals, and office supplies and equipment required in the Office of the Chief of Engineers to carry out the purposes of this appropriation, the purchase (not to exceed $59,625) of motor-pro- pelled passenger-carrying vehicles and motorboats for official use, and for preliminary examinations and surveys of flood-control projects authorized by law, $70,000,000, of which not to exceed $58,125,780 shall be available for expenditure upon projects on account of which allot- ments heretofore have been made: Provided, That $2,000,000 of this appropriation shall be transferred and made available to the Secre- tary of Agriculture for preliminary examinations and surveys, as authorized by law, for run-off and water-flow retardation and soil- erosion prevention on the watersheds of flood-control projects, includ- ing the employment of persons in the District of Columbia and else- Student officers at civil technical institu- tions. 41 Stat. 785. Printing and bind- ing. Provwos. Unauthorized sur- veys, etc. Maintenance of har- bor channels. Power-driven boats. Permanent Interna- tional Commission of the Congresses of Nav- igation. Flood control, en- eral, Poat, p. 1046 . 49 Stat. 1570. 33 U. S. C., Supp. V, J 701a-707. Prorit. Surveys for so- erosion prevention etc., on flood-ontrol projects.