The cast iron gaurantees and control that BASSA seek from BA are simply not possible and never have been, strike as long as an as many times as you are allowed, you will never achieve what you want, and I don't beleive that outside of the hardcore membership and representatives, anyone really wants it either.
All they want is some sort of job security. trouble is they have picked the worst time to fight this battle, and are not going to like the outcome if they continue blindly on a collision course with a 90 day notice.