• Complete the Independent Contractor Checklist (Part 1a). • Ask the potential contractor to complete Checklist (Part 1b) and Substitute form W-9.The following terms and conditions apply to all PCC purchases in addition to any terms set forth on the face of an. The parties are signing this Agreement as of the date stated in the introductory clause. List of all current AIA Contract Documents. This contract establishes a system-generated form Master Agreement ("MA") for Contractors to provide Pima County. Order (DO) document. Attaining the Sustainable Development Goals while getting on track to achieve Paris Agreement goals requires significant infrastructure investment.