Florida Rules of Appellate Procedure
RULE 9.370 AMICUS CURIAE

(b) Contents and Form. An amicus brief must comply with Rule 9.210(b) but shall omit a statement of the case and facts and may not exceed 20 pages. The cover must identify the party or parties supported. An amicus brief must include a concise statement of the identity of the amicus curiae and its interest in the case. 

(c) Time for Service. An amicus curiae must serve its brief no later than 5 days after the first brief, petition, or response of the party being supported is served. An amicus curiae that does not support either party must serve its brief no later than 5 days after the initial brief or petition is served. A court may grant leave for later service, specifying the time within which an opposing party may respond. The service of an amicus curiae brief does not alter or extend the briefing deadlines for the parties. An amicus curiae may not file a reply brief. 

(d) Notice of Intent to File Amicus Brief in Supreme Court. When a party has invoked the discretionary jurisdiction of the supreme court, an amicus curiae may file a notice with the court indicating its intent to seek leave to file an amicus brief on the merits should the court accept jurisdiction. The notice shall state briefly why the case is of interest to the amicus curiae, but shall not contain argument. The body of the notice shall not exceed one page.