definiens: means the [ * * * ] period commencing on the Effectiv e Date ; provided, however, that such period will be a n extended for up to [ * * * ] ( to expire on the -14- [ * * * ] of the Effective Date ) if : ( a ) GRAIL and its Opera tional Affiliates have paid at least $ [ * * * ] cumulat ively to [COMPANY] and its Affiliates for GRAIL ’s and its Operational Affiliates ’ purchase of Products from I llumina under this Agreement as of the [ * * * ] of the Effective Date ; and ( b ) GRAIL and its Opera tional Affiliates have exclusively purchased and utilized [COMPANY] sequenc ing instrument Products ( including with respect to any sequencing services performed by, for, or on behalf of GRAIL or its Operational Affiliate ) at all time s prior to the [ * * * ] of the Effective Date, and continue to exclus ively utilize [COMPANY] sequencing instrument Produc ts at all times prior to the [ * * * ] of the Effective Date . GRA IL will promptly provide [COMPANY] with Notice if at any time GRAIL or its Operational Affiliate purchases, acqui res, or otherwise utilizes any sequencing instrumen t other than an [COMPANY] sequencing instrument Product ( inc luding with respect to any sequencing services perf ormed by, for, or on behalf of GRAIL or its Operational A ffiliate )