In the event that the amount appropriated for reimbursement purposes pursuant to Section 17561 is not sufficient to pay all of the claims approved by the Controller, the Controller shall prorate claims in proportion to the dollar amount of approved claims timely filed and on hand at the time of proration. The Controller shall adjust prorated claims if supplementary funds are appropriated for this purpose. Notwithstanding any other law, if one thousand dollars ($1,000) or less is appropriated for a program, the Controller shall determine the most cost-effective allocation method.