California Code, Education Code - EDC § 24416

(a) If the board determines by June 30 of the then current fiscal year that the Supplemental Benefit Maintenance Account will not have sufficient funds to provide purchasing power protection benefits, as established in this chapter, of at least 80 percent for the subsequent fiscal year, the board, for that year, may do either, or a combination of the following:

(b) If the board finds that there is no unfunded obligation, as determined by the board's professional consulting actuary and affirmed by the Director of Finance, then in addition to the authority pursuant to subdivision (a), the board may transfer to an auxiliary Supplemental Benefit Maintenance Account, from any funds that are in excess of the amount needed to fund fully the benefits for which the Teachers' Retirement Fund is liable, an amount that would provide sufficient funds for no more than the estimated difference between the funds in the Supplemental Benefit Maintenance Account and the amount needed to pay the benefit level specified by the board, provided the benefit level is no more than 85 percent.

(c) If the board increases the employer contribution rate pursuant to paragraph (1) of subdivision (a), the increase between the current fiscal year contribution rate and the contribution rate in the next fiscal year, shall not exceed one-quarter of 1 percent of the creditable compensation upon which contributions are based.