If the brokerage company's lawyers won't let them move assets to a new internal account, I don't know how they would allow them to be moved to a new external one.  But sometimes these companies can work out differences between them.  There are way too many details lacking here.  The trust was supposed to be split, when the first spouse died?  But it wasn't?  And then most trusts provide that the assets be distributed and the trust ends, when the second spouse dies.  But this one continues, that's where the "irrevocable" terms come in?  Does the continuation trust include both trusts when the split should have been made when the first spouse died?  Or just one of them, the "Remainder" ? 

This really isn't an EIN question, it's an "I need legal help" question.