Here's a link to the IPA TA2016 that was overwhelmingly ratified; I provide this document as it contains both strikethroughs and bolded new language. If somebody wants a clean version of Contract 2016 let me know and I'll post a link to that.

1.D.7 Common Carriage Limitations was new language in TA2016, and can be referenced in the above document.

There's nothing in our contract that REQUIRES volume move by air; the Company is free to move volume by whatever mode makes service guarantees.