Below is a list of forms and information that may be required to complete a Request for Proposal Response. A master supply agreement is a legal contract between two parties that consolidates two or more current contracts into one streamlined agreement.An MSA, or Master Service Agreement, is a contract between a company and a vendor that outlines the terms and conditions for services the vendor will provide. A master purchase agreement is a legally binding contract between buyer and seller, and typically relates to buying and selling goods rather than services. The purpose of this Agreement is for the Supplier to provide the Full-Requirements Electricity. Supplier will update this list as. Auto-populate options to easily fill out information. (the "Consultant"), an Illinois. Corporation with offices at 2942 West Van Buren Street, Chicago, Illinois 60612.