| 31. | Director of United States Geological Survey. | |
| 31a. | Findings and purpose. | |
| 31b. | Definitions. | |
| 31c. | Geologic mapping program. | |
| 31d. | Advisory committee. | |
| 31e. | Geologic mapping program 5-year plan. | |
| 31f. | National geologic map database. | |
| 31g. | Biennial report. | |
| 31h. | Authorization of appropriations. | |
| 31i. | Report on resource research activities. | |
| 31j. | Biological research activity of Survey; review and report by National Academy of Sciences. | |
| 31k. | National Volcano Early Warning and Monitoring System. | |
| 31l. | Earth Mapping Resources Initiative. | |
| 32. | Acting Director. | |
| 33. | Repealed. | |
| 34. | Scientific employees. | |
| 35. | Repealed. | |
| 36. | Purchase of books. | |
| 36a. | Acquisition of scientific or technical books, maps, etc., for library. | |
| 36b. | Acquisition of lands or interests therein for use in gaging streams or underground water resources. | |
| 36c. | Acceptance of contributions from public and private sources; cooperation with other agencies in prosecution of projects. | |
| 36d. | Cooperative agreements. | |
| 37. | Omitted. | |
| 38. | Topographic surveys; marking elevations. | |
| 39 , 40. | Omitted. | |
| 41. | Publications and reports; preparation and sale. | |
| 42. | Distribution of maps and atlases, etc. | |
| 42a. | Use of receipts from sale of maps for map printing and distribution. | |
| 43. | Copies to Senators, Representatives, and Delegates. | |
| 44. | Sale of transfers or copies of data. | |
| 45. | Production and sale of copies of photographs and records; disposition of receipts. | |
| 46 to 48. | Omitted or Repealed. | |
| 49. | Extension of cooperative work to Puerto Rico. | |
| 50. | Survey’s share of cost of topographic mapping or water resources investigations carried on with States. | |
| 50–1. | Funds for mappings and investigations considered intragovernmental funds. | |
| 50a. | Working capital fund for United States Geological Survey. | |
| 50b. | Recording of obligations against accounts receivable and crediting of amounts received; work involving cooperation with State, Territory, etc. | |
| 50c. | Payment of costs incidental to utilization of services of volunteers. | |
| 50d. | Services of students or recent graduates. | |
| 50e. | USGS energy and minerals research facility. | |
