Actually in RES it really makes NO difference what tkt stock you are on....Since the introduction of Interline etkt agreements, I can reissue ANY tkt whether it AA (001) or DL 006...It's all the same to me....The issue is why would I take the time to look up AA's fare rules to change their tkt? When My company is not getting the Revenue....NW and DL fare rules are being aligned and that is mostly completed with a few exceptions....(Same day confirmed etc), but that will resolve itself soon...So, my point is....It really doesnt matter which tkt stock....After there is a sgl op Cert then everything from that point forward will be on 006...Vouchers will work on both AL and life will basically be unchanged....