Gas
Gas means any fluid, either combustible or noncombustible, hydrocarbon or nonhydrocarbon, which is extracted from a reservoir and which has neither independent shape nor volume, but tends to expand indefinitely. It is a substance that exists in a gaseous or rarefied state under standard temperature and pressure conditions.
Source
30 CFR § 1206.171
Scoping language
The following definitions apply to this subpart and to subpart J of part 1202 of this title: