definiens: sh all mean a list identifying each Antigen with respect to which [COMPANY] ( a ) prio r to December 27, 1999, has entered into an agreement that provides for the gra nt to an Affiliate or a Third Party of a license or other rights ( including, with out limitation, an option or a right of first refusal ) in and to the [COMPANY] Mic e, [COMPANY] Mice and/or KM - Mice to raise Antibodies against such Antigen on an Anti gen - exclusive basis ; or ( b ) on or after December 27, 1999, has entered or enter s into an agreement with an Affiliate or Third Party that provides for the gran t to an Affiliate or Third Party of a license or other rights ( including, with out limitation, an option or a right of refusal ) in connection with a HuMAb Proj ect ( other than a [COMPANY] Internal Project ) to raise Antibodies against such Antigen on an Antigen - exclusive basis