California Code, Public Resources Code - PRC § 6402

All applications to purchase state public lands and all sales pursuant thereto shall be subject to and contain a reservation to the State of all oil, gas, oil shale, coal, phosphate, sodium, gold, silver, and all other mineral deposits in all lands so acquired, and shall also contain a reservation to the State, and persons authorized by it, of the right to prospect for, mine, and remove such deposits and to occupy and use so much of the surface as may be required therefor, and all certificates of purchase and patents issued therefor shall contain such reservations.

Whenever authorized by law to make grants of land to the United States of America, or to an officer, department, or agency thereof, either in exchange for other lands or otherwise, the commission may make such grants with or without the reservation of deposits of oil and gas and other minerals required by this chapter.