I noticed a remark in this article that may or may not be true, but worth comment:
Navistar report catches Mahindra's attention - Chatham Daily News - Ontario, CA
Notice the Navistar spokesman says production of the Mahindra trucks started in January? If that is true, then things may move faster than I was thinking once the certification is in hand. Of course, it might be false or based on misinformation.