California Code, Welfare and Institutions Code - WIC § 11265.46

(a) For an assistance unit described in subdivision (a) of Section 11265.45, the grant amount a recipient shall be entitled to receive for each month of the year shall be prospectively determined as provided by this section. If a recipient reports that he or she does not anticipate any changes in income during the upcoming year, compared to the income the recipient reported actually receiving on the annual redetermination form, the grant shall be calculated using the actual income received. If a recipient reports that he or she anticipates a change in income in one or more months of the upcoming year, the county shall determine whether the recipient's income is reasonably anticipated. The grant shall be calculated using the income that the county determines is reasonably anticipated for the upcoming year.

(b) For purposes of this section, income shall be considered to be reasonably anticipated if the county is reasonably certain of the amount of income and that the income will be received during the year. The county shall determine what income is reasonably anticipated based on information provided by the recipient and any other available information.

(c) This section shall become operative on the first day of the first month following 90 days after the effective date of the act that added this section,  1 or October 1, 2012, whichever is later.