California Code, Code of Civil Procedure - CCP § 1203.58

Every person claiming a lien under this chapter, shall record in the office of the county recorder for the county in which such leasehold, or some part thereof, is situated, a verified statement setting forth the amount claimed and the items thereof, the dates on which labor was performed or material or services furnished, the name of the owner of the leasehold, if known, the name of the claimant and his mailing address, a description of the leasehold, and if the claimant be a claimant under Section 1203.54, the name of the person for whom the labor was immediately performed or the material or services were immediately furnished. The statement of lien must be recorded within six months after the date on which the claimant's labor was performed or his materials or services were furnished to be effective as to such labor, materials, or services.