All moneys of an authority shall be paid to the city auditor as agent of the authority, who shall not commingle such moneys with any other moneys. Such moneys shall be deposited in a separate bank account or accounts. The moneys in such accounts shall be paid out by the auditor on requisition of the chairman of the authority or of such other person or persons as the     authority may authorize to make such requisitions after audit by the auditor. Approval of the payment of an account or claim shall be recorded in the record of the proceedings of the authority and this shall be sufficient to indicate approval without requiring the approving members to sign or initial the voucher or order for payment. All deposits of such moneys shall, if required by the auditor or the authority, be secured by obligations of the United States or of the state of North Dakota of a market value equal at all times to the amount of the deposit, and all banks and trust companies are authorized to give such security for such deposits. The auditor and the auditor’s legally authorized representatives are authorized and empowered from time to time to examine the accounts and books of the authority, including its receipts, disbursements, contracts, leases, sinking funds, investments, and any other records and papers relating to its financial standing. An authority shall have power, notwithstanding the provisions of this section, to contract with the holders of any of its bonds as to the custody, collection, securing, investment, and payment of any moneys of the authority, or any moneys held in trust or otherwise for the payment of bonds or in any way to secure bonds, and to carry out any such contract notwithstanding that such contract may be inconsistent with the previous provisions of this section. Moneys held in trust or otherwise for the payment of bonds or in any way to secure bonds and deposits of such moneys may be acquired in the same manner as moneys of the authority, and all banks and trust companies are authorized to give such security for such deposits.