definiens: means, on a Buyer - by - Buyer basis : ( a ) with respect to the Exclusive Territory, the period commencing on the O ption Exercise Date and continuing until the date f i ve years after : either ( i ) the date of first commercial sale of the first POZEN Product sold in the United Stat es by such Buyer, if such Buyer ’s territory to Commercialize s uch POZEN Product includes both the United States a nd Canada, or ( ii ) otherwise, the date of first commer cial sale of the first POZEN Product sold anywhere in the Exclusive Territory by such Buyer ; and ( b ) with res pect to the Limited Territory, the period commencin g on the Option Exercise Date and continuing until the date five years after : either ( i ) the date of first comm ercial sale of the first Combination Product sold in the United Ki ngdom, France or Germany by such Buyer, if such Buy er ’s territory to Commercialize such Combination Product includes one or more of those three countries ; or ( ii ) otherwise, the date of first commercial sale of the first Combination Product sold anywhere in the Lim ited Territory by such Buyer