Cal. Government Code § 66450

(a) If a subdivision for which a parcel map is required lies within an unincorporated area, a certificate or statement by the county surveyor is required. If a subdivision lies within a city, a certificate or statement by the city engineer or city surveyor is required. The appropriate official shall sign, date, and, below or immediately adjacent to the signature, indicate his or her registration or license number and the stamp of his or her seal and state that: (1) He or she examined the map. (2) The subdivision as shown is substantially the same as it appeared on the tentative map, if required, and any approved alterations thereof. (3) All provisions of this chapter and of any local ordinances applicable at the time of approval of the tentative map, if required, have been complied with. (4) He or she is satisfied that the map is technically correct. (b) City or county engineers registered as civil engineers after January 1, 1982, shall only be qualified to certify the statements of paragraphs (1), (2), and (3) of subdivision (a). The statement specified in paragraph (4) of subdivision (a) shall only be certified by a person authorized to practice land surveying pursuant to the Professional Land Surveyors’ Act (Chapter 15 (commencing with Section 8700) of Division 3 of the Business and Professions Code) or a person registered as a civil engineer prior to January 1, 1982, pursuant to the Professional Engineers’ Act (Chapter 7 (commencing with Section 6700) of Division 3 of the Business and Professions Code). (c) The county surveyor, city engineer, or city surveyor, as the case may be, or other public official or employee qualified and authorized to perform the functions of one of those officials, shall complete his or her certificate or statement, as required by this section, within 20 days from the time the parcel map is submitted to him or her by the subdivider for approval. The completed parcel map shall be delivered to the county recorder or, if required by local ordinance, filed with the legislative body prior to delivery to the county recorder, within the same 20-day period.