CA Gov't Code Section 9131.5

When expenditures are made from the appropriate contingent fund at the direction of the Assembly Committee on Rules, the Senate Committee on Rules, or the Joint Rules Committee for advances for travel expenses, or for advances for goods or services, or when expenditures are made for advances for legislative printing, the person to whom advances were made shall reconcile the amount of the advance with the amount of the actual expenditure and repay all moneys in excess of the amount expended within 30 days of the date of the expenditure.