Cal. Civil Code § 8188

(a) An owner may record a notice of cessation if there has been a continuous cessation of labor on a work of improvement for at least 30 days prior to the recordation that continues through the date of the recordation. (b) The notice shall be signed and verified by the owner. (c) The notice shall comply with the requirements of Chapter 2 (commencing with Section 8100) of Title 1, and shall also include all of the following information: (1) The date on or about which labor ceased. (2) A statement that the cessation has continued until the recordation of the notice. (d) For the purpose of this section, “owner” means the owner who causes a building, improvement, or structure to be constructed, altered, or repaired, or that person’s successor in interest at the date a notice of cessation is recorded, whether the interest or estate of the owner be in fee, as vendee under a contract of purchase, as lessee, or other interest or estate less than the fee. Where the interest or estate is held by two or more persons as joint tenants or tenants in common, any one or more of the cotenants may be deemed to be the “owner” within the meaning of this section.