Originally Posted by
Goldorak
Indeed, this US text is very imprecise. Business class is discretely mentioned in section 5.2 only and it is nowhere mentioned that its's flight with no F. Very surprising.
But, unless they just changed the rules, I can guarantee you that the eligibility criteria is flying in J in a flight with no F.
I guess that you have access to inside information
The same text appears on European websites, such as NL, DE, etc...