(a) Persons specified in § 137.1(a) must consider whether the purchase price of the facility and the real property on which the facility is located reasonably reflects the fair market value of the facility and real property if oil was not present or likely present.
(b) If the persons conclude that the purchase price does not reasonably reflect the fair market value of that facility and real property if oil was not at the facility and the real property, they must consider whether or not the differential in purchase price and fair market value is due to the presence or likely presence of oil.