Since this was asked about the NYS SALTWATER REGISTRY....
Contrary to the dates listed on the NYS DEC page, you can use/dial the number listed: 1-866-933-2257 and either enroll (first time) or renew (last date and birth date to be given) for the MARINE REGISTRY.
They will give you a CONFIRMATION # which starts with DEC XXXXXXXXXXXXXXX and you can use that until you receive the hard copy in the mail within the next 14 or so days (normally much quicker).
Hope this info helps since the NYS DECALS website is just a mess, to put it nicely. The NJ Saltwater Registry website which I just told another fishermen to use today since he may be fishing within that states waters, is literally two minutes at most in typing in a bare few lines of info and printing it out.
For-hire vessel owners/operators MUST register if:
Carry individuals who engage in recreational fishing in the marine and fresh tidal waters of the State of New Jersey