definiens: means, with respect to each Unilateral Product an d each country in the applicable Royalty Region, the period beginning on the date of the First Commercial Sale of such Unilateral Produ ct in such country, and ending on the latest to occur of ( i ) the expiration of the last - to - expire [COMPANY] Pat ent, Reata Patent or Joint Patent that includes a Valid Claim that covers such Unilateral Product in such country ; ( ii ) the expiration of Regulatory Exclusivity in such countr y for such Unilateral Product ; and ( iii ) the fiftee nth ( 15 th ) anniversary of the First Commercial Sale of such Unilateral Product in such country, provided that, in the event a Generic Product is sold in such country, th e Royalty Term shall end on the later of : ( A ) the l ast day of the first Calendar Quarter in which unit sales of a ll Generic Products in such country exceed fifty pe rcent ( 50 % ) of the sum of unit sales of such Unilateral P roduct and all Generic Products in such country dur ing such Calendar Quarter ; and ( B ) the fifteenth ( 15 th ) anniversary of the First Commercial Sale of such Unilateral Product in such country