As used in this act:
This definition does not include a municipality or legal entity created solely by a municipality; a legal entity or agency created in whole or in part pursuant to part II of chapter 361; a metropolitan planning organization created pursuant to s. 339.175; a separate legal or administrative entity created pursuant to s. 339.175 of which a metropolitan planning organization is a member; an expressway authority pursuant to chapter 348 or any transportation authority or commission under chapter 343 or chapter 349; or a legal or administrative entity created by an interlocal agreement pursuant to s. 163.01(7), unless any party to such agreement is otherwise an agency as defined in this subsection.
A grant of rulemaking authority is necessary but not sufficient to allow an agency to adopt a rule; a specific law to be implemented is also required. An agency may adopt only rules that implement or interpret the specific powers and duties granted by the enabling statute. No agency shall have authority to adopt a rule only because it is reasonably related to the purpose of the enabling legislation and is not arbitrary and capricious or is within the agency's class of powers and duties, nor shall an agency have the authority to implement statutory provisions setting forth general legislative intent or policy. Statutory language granting rulemaking authority or generally describing the powers and functions of an agency shall be construed to extend no further than implementing or interpreting the specific powers and duties conferred by the enabling statute.
The term "party" does not include a member government of a regional water supply authority or a governmental or quasi-judicial board or commission established by local ordinance or special or general law where the governing membership of such board or commission is shared with, in whole or in part, or appointed by a member government of a regional water supply authority in proceedings under s. 120.569, s. 120.57, or s. 120.68, to the extent that an interlocal agreement under ss. 163.01 and 373.713 exists in which the member government has agreed that its substantial interests are not affected by the proceedings or that it is to be bound by alternative dispute resolution in lieu of participating in the proceedings. This exclusion applies only to those particular types of disputes or controversies, if any, identified in an interlocal agreement.
Fla. Stat. § 120.52