This page gives contact details for Hub.
System Ref - Ian SelleyThe System Ref should be contacted for any system/rules related queries. This can include querying effects, weapon safety, and anything that could need a rule call, for example 'Does skill X allow me to do Y?' is a system query. Also spell and race creation are system queries.
Plot Ref - Clare SelleyThe Plot Ref should be contacted for any world/plot related queries. They are in charge of the overarching plot for the system and therefore don't generally play. Questions such as 'I want to run a game, is this plot OK?' is a plot query. Clarification on what exactly a character knows about world events is also a world query.
Any other queries can be directed to either ref, however you are more likely to get a sensible answer faster if it's sent to the right person!