Another way they could merge the seniority list is to go DOH but have domicile fences and equipment fences(for current (including ordered) equipment) for X number of years. So if a United guy wanted to go fly at EWR or IAH he could, but he would be the most junior guy at the base and only hold what that seniority would get him. This would only apply to all pilots currently on a seniority list. The said pilot would only "gain seniority" at the CAL base when New Hires came in. Same thing for a CAL pilot who wanted to fly in SFO. He could go there but would be the most junior at that domicile.