Cal. Pub. Res. Code § 3412

On or before June 15 of each year, the department shall determine the rate or rates that will produce the sums necessary to be raised as provided in Section 3410. Within the same time, the department shall extend into the proper column of the record of assessments the amount of charges due from each person. The department shall post the information supporting the rate or rates on a publicly available portion of its internet website.