The doc specifically talks about training...singles, pairs/dance and synchro. Public sessions weren't mentioned (I think we can assume they're a long way away). Since the purpose of masks is to prevent respiratory droplets from traveling toward other people, and the more "athletic" you get, the more you exhale, saying skaters don't need to wear masks then basically defeats the purpose of their whole doc.Recreation?
But given that this is USFS, I shouldn't be surprised.