From NOAA Fisheries:

The SERO Permits office is now issuing one decal per fishery permit for the Gulf of Mexico Charter/Headboat for Reef Permit and Gulf of Mexico Charter/Headboat for Migratory Pelagics.   The SERO Permits office is also now charging a fee of $10 per decal.  If a permit holder has these two permits, they will be issued two (2) decals with a fee of $20.  This fee is in addition to the normal permit renewal fee.  This change became effective on February 14, 2017.

Please click here for the application and other information.

MORE INFORMATION:
If you have further questions regarding this matter, please contact the SERO Permits office at the above address or by telephone at (727) 824-5326, or toll-free at (877) 376-4877, weekdays between 8:00 a.m. and 4:30 p.m.

About Gulf of Mexico Fishery Management Council
The Gulf of Mexico Fishery Management Council is one of eight regional Fishery Management Councils established by the Fishery Conservation and Management Act of 1976. The Council prepares fishery management plans, which are designed to manage fishery resources within the 200-mile limit of the Gulf of Mexico.