This Work Authorization is to the AGREEMENT between Nassau County and the. Our General Services Agreement has 29 clauses in it!I've never made a contract or been paid before, so I'm not quite sure how to draw up a contract. What should I include? Nassau County Procurement and Contracts Management Department (PCM) functions as the central hub for purchasing and contracts management activities. When put together and signed, the custom proposal document and its attached terms and conditions comprise the binding agreement with the client. This clause should clearly define estimated start and completion dates, as well as any important milestones throughout the project.