California Code, Civil Code - CIV § 883.120

(a) This chapter does not apply to a mineral right reserved to the United States (whether in a patent, pursuant to federal law, or otherwise) or to an oil or gas lease, mining claim, or other mineral right of a person entitled pursuant thereto, to the extent provided in Section 880.240.

(b) This chapter does not apply to a mineral right of the state or a local public entity, or of any other person, to the extent provided in Section 880.240.