Florida has strict building codes due to the extreme winds that are especially important for Roofers. Being and expert roofer in Texas is different than being an expert roofer in Florida and the way that you can proof you know the codes is by getting licensed in the state.
There is plenty of work to be done here so we'd appreciate help from other states... but you will need to get licensed in order to prove that you can do the work that will stand up to future storms.