Fisty, time relief for AIPA officials was in the EBA but
AFAIK there was some sort of legal problem so it was agreed that some items (I think it was 2 but can't remember the other) were to be transferred to MOU without further negotiation. That guarantee was in the paperwork sent out to the troops and the EBA was voted up on that basis. As we now know, GD simply reneged on the deal, making him a liar and a thief - after all, we pilots paid for the time relief in earlier EBAs.
As for enforcement, AIPA has been in court on this one for some time. I fail to see why it is taking the bewigged people so long, it looks pretty clear to me - you guys do this (vote up the EBA) and in return we (Charlie Q) will do that, including (explicitly) time relief MOU. There isn't much more AIPA can do under the still current industrial law.