Fireworks require permits from several jurisdictions 

In the Florida Keys, fireworks displays require permits from several jurisdictions including Florida Keys National Marine Sanctuary. If fireworks will be discharged over water, the sanctuary requires a special use permit that includes a review of potential impacts on the sensitive marine ecosystem. If fireworks will be discharged from a floating platform, the U.S. Coast Guard also must review and approve the activity. Monroe County and the municipalities place restrictions on how close displays can come to buildings, hospitals, power lines and wooded areas with wind speed being a determining factor.

In all jurisdictions, operators must be properly licensed, certified and insured. Under Florida law, it is illegal for individuals to use exploding or flying fireworks. Only sparklers are approved for consumer use. Possession of illegal fireworks is a misdemeanor punishable by up to a year in prison and a $1,000 fine.

Licensed pyrotechnics companies interested in a FKNMS special use permit are directed to the permitting page of the FKNMS website:

https://floridakeys.noaa.gov/permits/welcome.html?s=management

Links to application forms may be found here. In addition, potential applicants are advised to submit an application for review 120 days prior to the anticipated event(s).