1. Activities which are not regulated by sections 256.450 to 256.483 include work by employees or subordinates of a registered geologist, provided that such work does not include responsible charge of work, and such work is performed under the direct supervision of a registered geologist who shall be responsible for such work.

2. The practice of geology affecting public health, safety, and welfare by officers and employees of the United States, solely as such officers and employees, shall not be regulated by sections 256.450 to 256.483.

3. Work of engineering and other licensed professions including the acquisition of engineering data involving soil, rock, groundwater, and other earth materials and the use of these data for engineering analysis, design, and construction by professional engineers appropriately registered or licensed in Missouri is exempted from the provisions of sections 256.450 to 256.483.

4. Work customarily performed by professionals such as chemists, archaeologists, geographers, speleologists, pedologists, and soil scientists is exempt from the provisions of sections 256.450 to 256.483.

5. The practice of geology not affecting public health, safety, and welfare within Missouri as determined by the board is exempt from the provisions of sections 256.450 to 256.483.