You want to apply for a PHRF-LO certificate for your class boat.
PHRF-LO has a limited number of One Design Recognized Class.
To qualify for the One Design Class certificate under PHRF-LO the owner must indicate, and validate upon request, to the handicapper that the sails either:
a. Have a Class Tag, Stamp or other indication of compliance with class rules and/or
b. Sails are within the maximum dimensions of the class rules indicated below when subjected to measurement.
One Design Recognized Classes as of 2016 are:
Farr 30 (Mumm)
Farr 40J 105
Melges 24 CF
For more details on these classes, please refer to our Handicappers Manual - Appendages.