Originally Posted by
WineCountryUA
no (there is no requirement to purchase E+ at booking if E- is blocked)
To clarify, if there are no E- seats available, you are not required to pay for E+. However if you select E+, you will be charged. I would be willing to bet that on the flight, the passenger would be in E-. I suppose there are cases of people not selecting seats prior to checkin and getting E+ assignments, but I'll bet they are about as rare as the silver op-up on a TPAC flight....