PHRF Chesapeake 2011 PHRF Fleet Policies
...One Design Ratings will only be provided to CBYRA recognized One Design Classes. In the event that the applicable class rules for a CBYRA recognized one-design class conflict with these regulations, the class rules shall take precedence." Also "Classes
...one design class rules, which limit headsail size, sail materials, or spinnakers do not apply to PHRF, unless the boat is rated as a one design class
(italics mine)....PHRF may, when requested by established one design classes, assign a rating to the one design configuration of that class. Each individual boat which desires to be issued a one design rating (ODR), must specifically request an ODR and agree to race only in that configuration in PHRF handicapped races."