The authority may appoint one or more paying agents for each issue or series or installment of bonds. Every such paying agent shall be an incorporated bank or trust company authorized by the laws of the United States or of the state in which it is located to do a banking or trust business. The authority may make such provisions respecting paying agents as it deems necessary or useful and may enter into a contract with any paying agents containing such terms, including its compensation, and such conditions in regard to the paying agents as the authority deems necessary or useful.