43 CFR § 3282.1
What is a participating area?
June 11, 2020
(a) A participating area is the combined portion of the unitized area which BLM determines:
(1) Is reasonably proven to produce geothermal resources; or
(2) Supports production in commercial quantities, such as pressure support from injection wells.
(b) The size and configuration of all participating areas and revisions are not effective until BLM approves them.