Exploration means the commercial search for oil, gas, and sulphur. Activities classified as exploration include, but are not limited to:
(1) Geological and geophysical marine and airborne surveys where magnetic, gravity, seismic reflection, seismic refraction, gas sniffers, coring, or other systems are used to detect or imply the presence of oil, gas, or sulphur; and
(2) Any drilling, whether on or off a geological structure.
30 CFR § 551.1
Terms used in this part have the following meaning: