definiens: means, with respect to a Royalty - Bearing Product in a country, that period of time beginning with the first commercialsale of such Royalty - Bearing Product in such country and ending on the later to expire of ( a ) the time during which the applicable Regulatory Authorityin such country is not permitted to grant Regulatory Approval for a generic equivalent of such Royalty - Bearing Product and ( b ): • with respect to a Royalty - Bearing Product being Commercialized by Regulus, the last Valid Claim of the Patent Rights licensed toRegulus pursuant to this Agreement or the Regulus Patent Rights Covering ( i ) the Manufacture of such Royalty - Bearing Product in suchcountry or ( ii ) the use, sale or other Commercialization of such Royalty - Bearing Product in such country ; or • with respect to a Royalty - Bearing Product being Commercialized by a Licensor, the last Valid Claim of the Patent Rights licensed to suchLicensor pursuant to this Agreement Covering ( i ) the Manufacture of such Royalty - Bearing Product in such country or ( ii ) the use, sale orother Commercialization of such Royalty - Bearing Product in such country