California Code, Government Code - GOV § 70355

(a) Except for the value computed under Section 70359, all values listed in this article shall be adjusted from the fiscal year of the expenditure to the month of the effective date of transfer for inflation using, as the inflation index, the average of the following three indices from the Bureau of Labor Statistics Producer Price Index, all rebased to equal 100 as of January 1996:

(b) For purposes of this section, “rebasing” means dividing all the values of the price index, by the value of the price index for the period to which the values are to be rebased, and multiplying the results by 100.