| 641. | Creation of Mississippi River Commission. | |
| 642. | Appointment of commissioners; vacancies; chairman; tenure of office. | |
| 642a. | Rank, pay, and allowances of Corps of Engineers officers serving as President of Mississippi River Commission. | |
| 643. | Omitted. | |
| 644. | Secretary of commission. | |
| 645. | Repealed. | |
| 646. | Headquarters and meetings of commission. | |
| 647. | Mississippi River survey. | |
| 648. | Arkansas River; levee and bank protection. | |
| 649. | Vicksburg Harbor and Ohio River below Cache River. | |
| 650. | Mississippi River below Rock Island; levee and bank protection. | |
| 651. | Tributaries of Mississippi River below Cairo; levee and bank protection. | |
| 652. | Upper Mississippi River Management. | |
| 653. | Extension of jurisdiction of Mississippi River Commission. | |
| 653a. | Extension of jurisdiction of Mississippi River Commission. | |