California Code, Health and Safety Code - HSC § 18928

(a) Each state agency adopting or proposing adoption of a model code, national standard, or specification shall reference the most recent edition of applicable model codes, national standards, or specifications.

(b) Each state agency adopting or proposing adoption of a model code, national standard, or specification shall adopt or propose adoption of the most recent editions of the model codes, as amended or proposed to be amended by the adopting agency, within one year after the date of publication of the model codes, national standards, or specifications.  The “date of publication of a model code, national standard, or specification” is either of the following:

(c) If the adopting agencies fail to comply with subdivision (b), the commission shall convene a committee to recommend to the commission the adoption, amendment, or repeal, on the agencies' behalf, of the most recent editions of the model codes, national standards, or specifications and necessary state standards.