Heyas,
The NWO/REP merger was arbitrated, and the result was known as the Robert's Award.
The list integration was done via a DOH process. There were no fences, BUT there were 20 year "quotas". These quotas were set-asides for former NWO pilots, which included both seats on the widebodies, and a certain amount of captain seats on the 727/757s. Former REP pilots had set-asides for captain seats on the 727/757 and DC-9. Once those quotas were filled, the seats were open to both sides.
There was a common contract, but it wasn't finalized until a few years after the merger. After that point, everyone was on the same contract.
Contrary to popular opinion, REP guys had access to WB seats almost immediately. Once a REP/NWO guy was senior enough to get a quota slot, he bid his DOH seniority once in the seat.
The award was subject to a number of additional arbitrations over the 20 year period, most having to do with what was considered "replacement aircraft".
The Roberts award "expired" in 2006. There was no bump and flush at that point, but the quotas went away.
Nu