definiens: means ( a ) with respect to the first Contract Year, the period beginning on the Effective Date and ending on December 31, 2008 ( the ), ( b ) with respect to each s ubsequent Contract Year other than the last Contract Year, th e one ( 1 ) year period beginning on the day followin g the end of the First Contract Year and each succeeding one ( 1 ) year period thereafter, and ( c ) with respect to the last Contract Year, the period beginning on January 1 of such last Contract Year and ending on the date as of which this Agreement expires or is terminated ( the ) . Each Contract Year ( other than the First Contract Year or the Last Contract Year ) shall be d ivided into four ( 4 ) comprised of successive three ( 3 ) month periods . In the First Co ntract Year, the first Contract Quarter shall end o n the first day following the Effective Date that is the last day o f a Contract Quarter, and in the Last Contract Year, the last Contract Quarter shall end upon expiration or termi nation of the Agreement