Does UA honor AC baggage allowance on Mixed Cabin Aeroplan Award Tickets? Will I get access to business class baggage allowance at EWR? Not sure how UA vs AC vs *A vs "most significant carrier" apply here, given the complexities regarding marketing carrier. Does anyone have first hand experience for a similar itinerary? Thank you!

EWR-LHR UA Economy
10 hour connection
LHR-BKK-TPE BR Business

*This is posted in the UA section given it's subject to UA policies / UA agent's discretion, not Aeroplan/AC.