2) "Most significant carrier" rule applies.... i.e. AC's (standard) allowance, 2 pieces. The 3rd piece, not sure. If it's on the e-ticket, yes. All my AC + JL (domestic) tickets say "2 pieces", including the JL segments.
>> I would assume I won't get any "priority checkin" because I will be checking-in at a JAL (OneWorld) Alliance desk.
Correct.
>> Will I be able to request priority labels on luggage
No. But it doesn't matter. The label is just for show. You will (should) automatically get priority handling on AC as it's determined by the automated baggage handling (and I.T.). Since this is Japan, quite possibly your luggage might be manually re-tagged with the priority tag at HND.
Last edited by beep88; Jan 29, 2019 at 9:44 am