I have to admit I'm still not quite sure what you mean by;
The tournament at Origins also uses only the official rules,
Or other references to official rules.
Do you mean it uses the basic FedCom rules - I assume not, obviously a Fed Com tourney uses Fed Com rules, and the basic fed com rules do not preclude any ship cards (obviously).
As I understand (maybe wrongly) there is a published product for tourney SFB that could be considered the official tourney rule set for SFB. But there is no such product for FedCom.
Do you mean there is an 'official' Tourney rule set that I am not aware of?
Or are you really meaning that you (or others) have unofficially classed the origins tournament rules as 'official' tournament rules. Certainly the threads about Origins does not title the rules as somehow Official tourney rules, but just as the 'tournament rules for origins' (2010 or whatever).
To me official rules for a tourney are simply what ever rules the organiser of a tourney says they are, so it is specific to each event. The entirety of the current online tourney rules are the official rules for that tourney in my mind, so the 'official' online tourney rules allow some of the e23 cards, and may even expand that selection for the next tournament.
Again it appears there is something obvious to you that isn't really that obvious to me, and hence probably isn't obvious to a number of other newer players.