Two members of the faction have tried to do it. One with the all privs. They don't see the Conference Center on the facility list (terrain lets to build all seize facilities). There is no the Conference Center DC either.
The question is: Have we missed any circumstances? The rules are obsolete? Maybe bugged?
Could it be related to the daily jobs not running properly - that is when the check for appropiate number of members is checked isn't it? Much like people mentioning that atmo damage is not running properly.