For information on fleet separation please refer to the Notice of Race.
Here are links for help in obtaining your rating certificate:

IRC :
International Rating Certificate

PHRF SEF :
Performance Handicap Racing Fleet of South East Florida

MOCRA :
Multihull Offshore Cruising & Racing Association

ORC :
Offshore Racing Congress
For US boats, certificates may also be obtained by contacting offshore@ussailing.org

ECRCA :
East Coast Racer Cruiser Association
Contact ECRCA Administrator Jay Tyson 813-220-1584 or jwtj29@gmail.com