California Code, Health and Safety Code - HSC § 18502

(2)(A) An additional annual fee of four dollars ($4) per lot shall be paid to the department or the local enforcement agency, as appropriate, at the time of payment of the annual operating fee.  All revenues derived from this fee shall be used exclusively for the inspection of mobilehome parks and mobilehomes to determine compliance with the Mobilehome Parks Act (Part 2.1 (commencing with Section 18200)) and any regulations adopted pursuant to the act.

(B) The Legislature hereby finds and declares that the health and safety of mobilehome park occupants are matters of public interest and concern and that the fee paid pursuant to subparagraph (A) shall be used exclusively for the inspection of mobilehome parks and mobilehomes to ensure that the living conditions of mobilehome park occupants meet the health and safety standards of this part and the regulations adopted pursuant thereto.  Therefore, notwithstanding any other law or local ordinance, rule, regulation, or initiative measure to the contrary, the holder of the permit to operate the mobilehome park shall be entitled to directly charge one-half of the per-lot additional annual fee specified herein to each homeowner, as defined in Section 798.9 of the Civil Code.  In that event, the holder of the permit to operate the mobilehome park shall be entitled to directly charge each homeowner for one-half of the per-lot additional annual fee at the next billing for the rent and other charges immediately following the payment of the additional fee to the department or local enforcement agency.