California Code, Health and Safety Code - HSC § 19990

(a) Except as provided in Section 18930, the department shall adopt rules and regulations to interpret and make specific this part. The department shall adopt and submit building standards for approval pursuant to Chapter 4 (commencing with Section 18935) of Part 2.5 of this division for the purposes described in this section. Standards adopted, amended, or repealed from time to time by the department pursuant to this chapter shall include provisions imposing requirements reasonably consistent with recognized and accepted standards contained in the most recent editions of the following international or uniform industry codes as adopted or amended from time to time by the organizations specified:

(b) The department shall require every city and county to file with the department all wind pressure and snow load requirements in effect within their respective jurisdictions if these requirements differ from building standards published in the State Building Standards Code, on or before January 1 of each year. The department shall notify every manufacturer of factory-built housing of these requirements on or before March 1 of each year.

(c) Except as provided in Section 18930, the department shall adopt other rules and regulations as it deems necessary to carry out this part. In promulgating these other rules and regulations the department shall consider any amendments to the model codes referred to in this section. In the event of any conflict with respect to factory-built housing between Part 1.5 (commencing with Section 17910) and this part, the requirements of this part shall control.