I was recently informed that DOT rules now stipulate that the MSC rule is no longer applicable in the US. If I understand it correctly, for flights leaving or terminating in the US, the luggage rules of the first flight flown are applicable to the journey.

​​​​​mikexner sometimes it's a question of principal and not dollars. I've happily wait on hold on speakerphone while doing other work for less, as a matter of principle.