Here is the link to do it! Whether you fly-fish on Nantucket, fish from the shore or the boat, you need a permit. The only exception is if you are fishing with a guide on a boat, they will have the permit for you.

Go wet a line, go catch a striped bass or bluefish and go have a good time

http://www.mass.gov/eea/agencies/dfg/dmf/recreational-fishing/recreational-saltwater-permits.html