Common use of a b Clause in Contracts

a b. In accordance with Section(s) of the original Contract routing number between the State of Colorado, Department of Transportation, and Contractor's Name, covering the term Insert Orig start date through Insert Current ending date, the State hereby exercises its option for an additional term beginning Insert Option start date and ending on Insert New ending date at a cost/price specified in Identify the Section, Schedule, Attachment, Exhibit etc, AND/OR an increase/decrease in the amount of goods/services at the same rate(s) as specified in Identify the Section, Schedule, Attachment, Exhibit etc.