20.—(1) An application for an extension of the time allowed for the stuffing and unstuffing of containers under regulation 19 may be made by giving a notice in writing to a proper officer of customs not less than one hour before the expiration of that time.
(2) Where an extension of time is granted under paragraph (1), the applicant shall pay on demand such fee as the Director-General may charge under section 98 of the Act for the attendance of an officer of customs.
(3) A proper officer of customs may refuse to accept an application if notice has not been given within the time specified in paragraph (1).