If available, the Contractor, in performing work under this contract, shall use. Flag carriers for international air transportation of personnel (and their.A transportation service agreement is a legal document that defines the rights and duties of both parties to the contract. How do I fill this out? Application for Contractor Prequalification. The application can be filled out online, printed and submitted to: Arizona Department of Transportation The GSA Schedules are some of the largest contracting tools in the federal government.