(a) The operators who will be required to pay under the board’s rule or order at least 75 percent of the unit operation costs; and
(b) The persons or state or local governing body, special district or agency that, at the time of the board rule or order, own record legal title to 75 percent of the royalties payable with respect to the geothermal resource produced from the unit area.
(2) If the royalty owners who own the required percentage interest in the unit area and the operators have not approved the unitization plan within six months of the date on which the rule or order creating the unit is adopted or entered, that rule or order shall become ineffective and shall be considered to have been repealed or revoked by the board. [1981 c.588 §12]