California Code, Business and Professions Code - BPC § 10133.35

(a) To act as a depository under an oil lease, gas lease, or oil and gas lease other than for purpose of sale.

(b) To engage in any transaction subject to an order of a court of competent jurisdiction.

(c) To engage in the business of drilling for or producing oil or gas or mining for or producing minerals.

(d) To negotiate leases or agreements between an owner of mineral, oil, or gas lands, leases, or mineral rights, and a person organized for or engaging in oil or gas or mineral or metal production, or to enter into leases or agreements with an owner of mineral, oil, or gas lands, leases, or mineral rights on behalf of a disclosed or undisclosed person organized for or engaging in oil or gas or mineral or metal production.

(e) To deal with mineral rights or land, other than oil or gas rights or land, as the owner of the rights or land.