California Code, Business and Professions Code - BPC § 7125.6

(a)(1) At the time of renewal, all active licensees who have on file a current and valid Certificate of Workers' Compensation Insurance or Certification of Self-Insurance, or who are required to provide those certificates pursuant to subdivision (a) of Section 7125, shall certify on the license renewal form for the three workers' compensation classification codes for which the highest estimated payroll is reported on the policy.  If the licensee has fewer than three classification codes reported on the policy, the licensee shall provide every classification code reported on the policy.

(2) The board shall not be required to verify or investigate the accuracy of the licensee's classification code or codes provided by the licensee pursuant to paragraph (1).

(3) The board shall not be held liable for any classification code or codes misreported by a licensee.

(b)(1) Except as provided in paragraph (2), a license shall not be renewed unless the licensee complies with this section.

(2) If the documentation and information required by subdivision (a) is not provided with the license renewal form but is received within 30 days after notification by the board of the renewal rejection, the registrar shall grant a retroactive renewal pursuant to Section 7141.5 back to the date of the postmark of the otherwise acceptable renewal.  A renewal that is still incomplete for any reason more than 30 days after notification of rejection shall not be eligible for retroactive renewal under this subdivision.