157. No person may make a geophysical survey to determine whether geological conditions are favourable to exploration for petroleum, natural gas, brine or underground reservoirs unless he holds a licence for geophysical surveying issued by the Minister.
The words “geophysical surveying” mean any method of exploration for petroleum, natural gas, brine or underground reservoirs by indirect measurement of the physical features of the subsoil effected above or on the surface, particularly seismic reflection, seismic refraction, gravimetric, magnetic, resistivity or geochemical surveying and any other indirect method used to determine any feature of the subsoil.