definiens: means, with respect to each country in the Territ ory, the period beginning on the date of the First Commercial Sale of Licensed P roduct in such country, and ending on the latest to occur of ( a ) the expiration of the last - to - expire Licensed P atent that includes a Valid Claim in such country c laiming the composition of matter or formulation of such Licens ed Product, the method of making such Licensed Prod uct ( to the extent such method is actually used in the Manu facturing of Licensed Product by or on behalf of Li censee, its Affiliates and/or Sublicensees ) or the method of us ing such Licensed Product ( to the extent such metho d is described in the labelling of Licensed Product ) ; ( b ) the expiration of Regulatory Exclusivity in such country for Licensed Product ; and ( c ) the 10 th anniversary of the First Commercial Sale of Licens ed Product in such country