One Design Racing Class Association
The original B-25 class rules were created for the last B25 North American Championship, held in California in the late 1990s. Those rules were used as a basis for the new, draft B25 Class Rules. With this new draft, we modified the original rules to better account for a number of changes and modifications that most owners have implemented over the years since the original 1988 production run. Notably, the restrictions on the rudder dimensions have been relaxed to account for the vast majority of aftermarket rudders currently in use, and the maximum crew weight has been increased to better represent the crews currently sailing these boats.
See the link below for a PDF copy of the new, draft B25 Class Rules.