A permit is required to "control, eradicate, remove, or otherwise alter" aquatic plants in all surface bodies of water, except for those wholly owned by one person and not connected to any "Waters of Special Concern".
State Contact Information
Licenses and Permits http://myfwc.com/license/aquatic-plants/
Aquatic Plant Management http://myfwc.com/wildlifehabitats/invasive-plants/aquatic-plant/
Local Contact Information