Fla. Stat. § 40.31
If the Justice Administrative Commission has reason to believe that the amount appropriated by the Legislature is insufficient to meet the expenses of witnesses during the remaining part of the state fiscal year, the commission may apportion the money in the treasury for that purpose among the several counties, basing such apportionment upon the amount expended for the payment of witnesses in each county during the prior fiscal year. In such case, each county shall be paid by warrant, issued by the Chief Financial Officer, only the amount so apportioned to each county, and, when the amount so apportioned is insufficient to pay in full all the witnesses during a quarterly fiscal period, the clerk of the court shall apportion the money received pro rata among the witnesses entitled to pay and shall give to each witness a certificate of the amount of compensation still due, which certificate shall be held by the commission as other demands against the state.
Fla. Stat. § 40.31