Hillsborough County Aviation Authority. Supplemental Contract to Base Agreement for Construction Payment Application and Invoice.This is a sample of 5 pages out of 15 of the International Construction Contract. View contract documents, search for contract documents, view current agreements, term contract information. The Town of Hillsborough is requesting proposals from qualified firms for professional consulting services to collect the locations of Town assets. This will also minimize and consolidate the number of platforms used in the solicitation process to one platform. A template contractor agreement specifically designed for Australian-based businesses to use when hiring contractors who are based outside of Australia. An additional personal leave may be granted after each three complete years of teaching experience in the Hillsborough County School. System.