Fla. Stat. § 200.151

In the event any municipality should lose revenue through the loss of a proprietary activity or other source of revenue, the governing body of the municipality is authorized to increase the millage in an amount sufficient to restore such loss of revenue. In the event any municipality should relinquish any governmental function to a county or other governmental body, the governing body of such municipality shall reduce the millage in an amount which will equal the cost of such governmental function.