Cal. Const. art. XVI, § 22
(a) Upon the Governor’s proclamation declaring a budget emergency and identifying the conditions constituting the emergency, the Legislature may pass a bill that does any of the following:
(2)
(b) For purposes of this section, “budget emergency” means any of the following:
(2)
(A) A determination by the Governor that estimated resources are inadequate to fund General Fund expenditures for the current or ensuing fiscal year, after setting aside funds for the reserve for liquidation of encumbrances, at a level equal to the highest amount of total General Fund expenditures estimated at the time of enactment of any of the three most recent Budget Acts, adjusted for both of the following: