Except to the extent more limited rights are provided elsewhere in this Agreement, if a default occurs or is claimed to have occurred under this Agreement, the non-defaulting Party shall give the defaulting Party written notice describing such default. The defaulting party shall then have at least thirty (30) days after receipt of such notice to cure the default if the default is claimed under Section 13.1(a) , or sixty (60) days after receipt of such notice to cure the default if the default is claimed under Section 13.1(b) . To the extent, however, the Section 13.1(b) default cannot be cured in such sixty (60) day period through the exercise of reasonable diligence, the defaulting Party shall have a reasonable additional period of time, not to exceed sixty (60) days in which to cure such default. The additional sixty (60) day extension set forth in the prior sentence is conditioned on the defaulting Party commencing promptly within the initial sixty (60) day period immediate and substantial good faith efforts to effect a cure and at all times thereafter proceeding diligently to complete such cure.