Some events, like the Newport to Bermuda race limit the number of professionals per boat in the Corinthian and Cruising divisions (see their NOR sections 3.2.5. and 3.2.6). The International Sailing Federation (ISAF) is the authority for determination of that status. For information on how to be classified, go to the ISAF home page www.sailing.org and click on the button marked “Sailors” along the top edge. This will take you to the two-step registration process. Step 1 is to register as an ISAF sailor and step 2 is to complete and submit the classification form. There is no charge for this.