Since this is really for those PHRF districts where they take a hit for not complying with the one design rule, why not change the rule to this instead.
Two additional spinnakers may be carried: a 0.5 oz spinnaker which may be used at owners discretion, but only for PHRF racing; a backup 0.75 oz may be carried, but only may be used if the primary .75 oz. spinnaker is damaged. The #2 is optional."
It would change the one design rules to allow the half ounce to be used for PHRF racing. It would not impact those of us fortunate enough to have one design competition.