Fla. Stat. § 161.40

All properties, revenues and other assets of the board of county commissioners acting as the beach and shore preservation authority, or of any of the districts created thereby, shall, by recognition of its essential public function, be exempt from all taxation by the state or any political subdivision, agency or instrumentality thereof. The exemption granted by this section shall not apply to any tax imposed by chapter 220 on interest, income, or profits on debt obligations owned by corporations.