15. Where the Comptroller elects, or is required by the Court, to appear on the hearing of an application under section 23 or 24 of the Act, he shall not be required to give notice of the grounds of any objection he may think fit to take or of any evidence he may think fit to submit to the Court, but he may give the applicant written notice before the hearing of any observations on the applicant's petition or originating summons, as the case may be, and on the applicant's evidence and accounts which he may think fit to make at the hearing.