Florida vehicle law page
And quoting from that page:

Bumper Height Requirements
Owners of automobiles and pickup trucks are required to have both front and rear bumpers mounted within certain height levels. Height limitations are governed by the new shipping weight of the vehicle; not the modified or altered weight. The maximum allowable heights between the pavement and bottom of the front and rear bumper, as provided by Section 316.251, Florida Statutes, are:

Cars with a net weight of less than 2,500 pounds - 22 inches front and rear;
Cars 2,500 pounds or more but less than 3,500 pounds - 24 inches front and 26 inches rear;
Cars 3,500 pounds or more - 27 inches front; 29 inches rear;
Trucks under 2,000 - 24 inches front; 26 inches rear;
Trucks 2,000 pounds or more but less than 3,000 pounds - 27 inches front, and 29 inches rear;
Trucks 3,000 pounds or more but not more than 5,000 pounds - 28 inches front; 30 inches rear.