I recently went through the somewhat difficult process of applying for an Amateur Radio license plate for my car. While the actual application is not hard (just fill out a form, and present it along with a copy of your vehicle registration, insurance card, and Amateur license, instructions here https://www.flhsmv.gov/specialtytags/pmlpfaq.html#12), they apparently do not process very many of these applications at Florida tag agencies. The clerks could not remember the specialty tag request code! After about 45 minutes of hunting for the code, they finally found it – “RGA.” I am apparently not the only one who has had this problem in the state of Florida, John KU8Q has written a helpful article explaining the exact process he went through (very similar to my experience). It’s here, on the LWRA website https://lwra.us/wp-content/uploads/2010/07/Call-sign-license-plate.pdf
Hopefully this will help anyone else looking to apply for an Amateur tag in Florida to speed up their application process considerably!