I knew it would take me a litle time to find it...but here is the FL statute on this...hope you fight it!
The 2005 Florida Statutes
Title XXIII
MOTOR VEHICLES
Chapter 316
STATE UNIFORM TRAFFIC CONTROL
View Entire Chapter
316.605 Licensing of vehicles.--
(1) Every vehicle, at all times while driven, stopped, or parked upon any highways, roads, or streets of this state, shall be licensed in the name of the owner thereof in accordance with the laws of this state unless such vehicle is not required by the laws of this state to be licensed in this state and shall, except as otherwise provided in s. 320.0706 for front-end registration license plates on truck tractors and s. 320.086(5) which exempts display of license plates on described former military vehicles, display the license plate or both of the license plates assigned to it by the state, one on the rear and, if two, the other on the front of the vehicle, each to be securely fastened to the vehicle outside the main body of the vehicle in such manner as to prevent the plates from swinging, and all letters, numerals, printing, writing, and other identification marks upon the plates regarding the word "Florida," the registration decal, and the alphanumeric designation shall be clear and distinct and free from defacement, mutilation, grease, and other obscuring matter, so that they will be plainly visible and legible at all times 100 feet from the rear or front. Nothing shall be placed upon the face of a Florida plate except as permitted by law or by rule or regulation of a governmental agency. No license plates other than those furnished by the state shall be used. However, if the vehicle is not required to be licensed in this state, the license plates on such vehicle issued by another state, by a territory, possession, or district of the United States, or by a foreign country, substantially complying with the provisions hereof, shall be considered as complying with this chapter. A violation of this subsection is a noncriminal traffic infraction, punishable as a nonmoving violation as provided in chapter 318. [/QUOTE]