The Phoenix Bloodline for sorcerer is marked as PFS Limited which states:
A limited option is rarer in Society play, but not unheard of. A limited option can be selected only if specifically allowed by a boon—whether from the Achievement Points system, a Chronicle Sheet, or another other option from a Pathfinder Society source—even if the option is common or if the character meets the normal prerequisites or access requirements printed in the option’s source.
Its not marked as restricted but I cannot find a boon for either of the three options listed. Does a way to play this bloodline exist or is it some kind of future proofing so that the bloodline could be chosen in the future?