All income, revenue, receipts, profits, and money of an authority from whatever source derived shall be paid either to the treasurer of the city in which such authority is established as ex officio treasurer of the authority who shall not commingle such money with any other money under his or her control or to the person appointed as treasurer of the airport authority in accordance with section 3-506.01. Such money shall be deposited in a separate bank, capital stock financial institution, or qualifying mutual financial institution account or accounts. Such money shall be withdrawn only by check, draft, or order signed by the treasurer on requisition of the chairperson of the authority or of such other person or persons as the authority may authorize to make such requisitions, approved by the board. The chief auditing officer of the city and his or her legally authorized representatives are hereby authorized and empowered from time to time to examine the accounts and books of such authority, including its receipts, disbursements, contracts, leases, sinking funds, and investments and any other matters relating to its financial standing. Notwithstanding the provisions of this section, such authority may contract with the holders of any of its bonds as to collection, custody, securing, investment, and payment of any money of the authority or any money held in trust or otherwise for the payment of bonds or in any way to secure bonds. The authority may carry out any such contract notwithstanding that such contract may be inconsistent with the previous provisions of this section. All banks, capital stock financial institutions, qualifying mutual financial institutions, and trust companies are hereby authorized to give security for such deposits of money of authorities pursuant to the Public Funds Deposit Security Act. Section 77-2366 shall apply to deposits in capital stock financial institutions. Section 77-2365.01 shall apply to deposits in qualifying mutual financial institutions.