Fla. Stat. § 308.03
The mayor and council may grant license in conformity to this chapter, under such rules and regulations as they may prescribe, and such ordinances and orders as in their judgment may be most conducive to the interests of their port, and for the government of the shipping and for the welfare and protection of the marine and seamen, subject to the laws of the United States, and for the direction and government of said shipping masters as they may deem proper; and the same at any time may amend or revoke, and may impose fines for the violation of such rules, ordinances, orders and regulations, provided such fines so imposed by city or town authority under this chapter shall not exceed $50 for each offense in violating said rules, orders and regulations or ordinances.
Fla. Stat. § 308.03