Guides and captains maintaining vessels used for recreational fishing are an important part of coastal economies, but regulations affecting them can be complicated and may differ depending on several factors, including targeted species, number of customers, vessel size, etc. These regulations are often described in multiple locations, since for-hire guides operate at the intersection of multiple state and federal jurisdictions. This 3-page fact sheet written by Elizabeth A. Staugler, Ralph Allen, and Edward V. Camp and published by the UF/IFAS School of Forest Resources and Conservation, Program in Fisheries and Aquatic Sciences summarizes the relevant regulations and requirements.
https://edis.ifas.ufl.edu/fa218