Subject to subsection 19.F.2.a, if business-class travel is not available the Company may require the Crewmember to travel in coach class; provided, for an International Deadhead segment, the Crewmember shall receive compensation in the amount of five hundred dollars ($500.00) or a five hundred dollars ($500.00) Travel Bank credit under Section 19.J in lieu thereof, whichever the Crewmember elects. Subject to subsection 19.F.2.a, a Crewmember may not refuse commercial air travel in coach class if business class travel (or better) is unavailable.