@Southbound: I do not know what to tell you, other than I do I have a nice green Pre-Authorization letter in hand. Perhaps when they say 12-Feb-2021, they actually mean flights on 13-Feb-2021? I agree, it is very confusing. Ultimately, I have to believe that the person approving my application knows what he/she is doing with respect to the rules. Nothing on the Authorization form indicates when I submitted the application, the date of my covid tests or even when the authorization was approved.

Warmly,
S&M