California Code, Business and Professions Code - BPC § 10131

(a) Sells or offers to sell, buys or offers to buy, solicits prospective sellers or buyers of, solicits or obtains listings of, or negotiates the purchase, sale, or exchange of real property or a business opportunity.

(b) Leases or rents or offers to lease or rent, or places for rent, or solicits listings of places for rent, or solicits for prospective tenants, or negotiates the sale, purchase, or exchanges of leases on real property, or on a business opportunity, or collects rents from real property, or improvements thereon, or from business opportunities.

(c) Assists or offers to assist in filing an application for the purchase or lease of, or in locating or entering upon, lands owned by the state or federal government.

(d) Solicits borrowers or lenders for or negotiates loans or collects payments or performs services for borrowers or lenders or note owners in connection with loans secured directly or collaterally by liens on real property or on a business opportunity.

(e) Sells or offers to sell, buys or offers to buy, or exchanges or offers to exchange a real property sales contract, or a promissory note secured directly or collaterally by a lien on real property or on a business opportunity, and performs services for the holders thereof.