Florida Marriage Laws: What the State Constitution says…

SECTION 27. Marriage defined.—Inasmuch as marriage is the legal union of only one man and one woman as husband and wife, no other legal union that is treated as marriage or the substantial equivalent thereof shall be valid or recognized.

History.—Proposed by Initiative Petition filed with the Secretary of State February 9, 2005; adopted 2008. 

Source: Florida State Constitution