The director of printing shall hereafter deliver the whole number of copies of reports of the supreme court and court of appeals required to be published to the state law librarian as soon as completed; and when the whole edition of any volume shall be so delivered, the librarian shall certify that fact to the secretary of state, who shall thereupon ascertain the amount due the director of printing therefor, and audit and certify the same to the director of accounts and reports for payment.