What prompted us to write the letter was simply that December 31 is rapidly approaching. We have a domestic legislative process that needs to follow the conclusion of any deal, and time is running short now. It was running short then when we wrote the letter. Certainly, if you're a business that needs to lock in pricing contracts for January 1 for your exports, you want to know what the tariff is that you may be paying, so that's why we wrote the letter: to underscore the urgency of completing this agreement.
On November 16th, 2020. See this statement in context.