Correct, J30 Rule 5.9.1.9 Allow the attachment of the main sheet block to the front or back of the traveler. Rule 5.9.2.2 Prohibits the use of a main sheet pennant. This is a short piece of line or wire between the top block of the main sheet and the bail on the boom and shortening the main sheet.
There is no provision to allow the replacement of the bail on the boom with a strap or bridle as is often done on carbon fiber booms.
Larry Christy
Class Measurerer
