definiens: with respect to a Party means the occurrence of any of the following events : ( a ) Except as provided in Section 6.2(b ) be low, the failure of a Party to comply with or perform any material non - monetary provision of this Agreement, and such failure remains uncured 18 22 for sixty ( 60 ) days following written notice of suc h failure ( if such default is cured within the cure period, such written notice s hall be null and void ), provided that, if the default can not be reasonably cured within sixty ( 60 ) days, and the defaulting party can establish to the reaso nable satisfaction of the other party that it is diligently and actively purs uing a cure at the expiration of the cure period, and that the default is reasona bly capable of being cured, then the cure period shall be extended for so long as a cure is being diligently and actively pursued