Health & Saf. Code, § 18116

(a) A license fee is due and payable each year for renewal of registration, on or before midnight of the expiration date assigned by the department and noted on the registration card for all manufactured homes, mobilehomes, and commercial coaches which are not subject to local property taxation or otherwise exempt. The license fee is due and payable to the department in accordance with the following applicable time periods:

(1) As of the original date of sale, rental, or lease of a new commercial coach.

(2) Twenty days after the date of entry into California of a commercial coach previously registered in another state.

(3) Twenty days after the date of entry into California of a manufactured home or mobilehome sold as new prior to July 1, 1980, and previously registered in another state.

(b) License fees due for original registration of a new commercial coach are delinquent if not deposited with the department within 10 days of the original date of sale, rental, or lease. License fees due for renewal of registration for a manufactured home, mobilehome, or commercial coach are delinquent if not paid on or before midnight of the expiration date assigned by the department and noted on the registration card that was last issued. License fees due for a manufactured home, mobilehome, or commercial coach previously registered in another state are delinquent if not paid within 40 days after the date of entry into California. A penalty equal to 20 percent of the license fee due shall be added to any license fee due if it is allowed to become delinquent for a period of from 1 through 119 days. No penalty is due if the application and required license fees were placed in the United States mail before midnight on the day before the fees became delinquent, as evidenced by postmark or affidavit by the applicant.

(c) An added penalty of fifty dollars ($50) per transportable section shall be collected along with any other license fee and penalty due if the license fee for renewal of registration for a manufactured home or mobilehome is allowed to become delinquent for 120 days or more.

(d) An added penalty of two hundred dollars ($200) for each commercial coach shall be added to any license fee and penalty due if the license fee due for an original registration or for each subsequent renewal of registration is allowed to become delinquent for 120 days or more.

(e) It is the intent of the Legislature that license fees levied on manufactured homes, mobilehomes, or commercial coaches subject to this part shall not be altered or increased from the rates and levels of license fees established prior to January 1, 1981.