The Procurement Agent shall provide forms of purchase orders that shall be used for the purchase of all Materials and Services for or on behalf of the Town. Open purchase orders may be utilized for the routine purchase of regularly-supplied items; provided, that an open purchase order shall be limited to a single source and shall not be valid for more than $10,000 in the aggregate. (16-13, Amended, 12/01/2016, and Restated; 13-04, Amended, 11/21/2013)