To execute the assignment of a licensee or vendor to a vending facility, the licensee or vendor shall enter into an agreement with the department which states the terms and conditions of the assignment to the specific vending facility. The department will provide each vendor with a copy of these rules which include the description of the arrangements for providing services. The department will take adequate steps to assure that each vendor understands the provisions of any permit, contract or agreement under which he/she operates as evidenced by the vendor's signed statement. No vendor will operate a vending facility unless he/she signs a vendor agreement. An existing agreement between the department and a vendor is automatically terminated when the vendor signs a new agreement with the department.