Fla. Stat. § 25.031
The Supreme Court of this state may, by rule of court, provide that, when it shall appear to the Supreme Court of the United States, to any circuit court of appeals of the United States, or to the Court of Appeals of the District of Columbia, that there are involved in any proceeding before it questions or propositions of the laws of this state, which are determinative of the said cause, and there are no clear controlling precedents in the decisions of the Supreme Court of this state, such federal appellate court may certify such questions or propositions of the laws of this state to the Supreme Court of this state for instructions concerning such questions or propositions of state law, which certificate the Supreme Court of this state, by written opinion, may answer.
Fla. Stat. § 25.031