the only licensure i know of for boats that mexico had was the
fishing licensure--conapesca will answer your questions. you HAVE to have one of these BEFORE you bring
fishing equipment into mexican waters. they take poaching very very seriously--and it takes 6 months to get the license online--san diego downtown is the only place to get these in the
usa. if you know anyone who lives there / here, then send them to get it for you so it only takes 5 min.. look up conapesca online and see the
current fees. mine were nearly 100dollars for 2 people for one year.. each crew
member needs one. no longer needed for boat or dinks,. as used to be the case.
other than that--i know of no licensure required for mexican waters and i have been boarded by the mexican
navy in their waters--this is to be expected, they will look for fishing
equipment and drugs and firearms. bring none of those. this will be reinforced in downwind marine's cruiser guide for the
baja haha and southbound sailors....