Cal. INS § 11751.5

The commissioner, after notice and hearing, may promulgate reasonable rules and statistical plans, which may be modified from time to time and which shall be used thereafter in the recording and reporting by insurers of their loss and expense experience in order that the experiences of all insurers may be made available in such form and detail as may be necessary to aid the commissioner in administering the provisions of Article 2 (commencing with Section 11730). The commissioner shall designate a rating organization licensed under this article as his or her statistical agent to gather and compile such experience statistics and all licensed rating organizations shall report the experience of their members to such designated rating organization. Subject to reasonable rules approved by the commissioner, such designated rating organization shall make such experience statistics, when compiled, available to all licensed rating organizations and may make a reasonable charge to other rating organizations for the expense incurred by it in combining, tabulating and compiling the experience of all workers’ compensation insurers.