57.—(1) A private bus may be used for the conveyance of adults to and from their place or places of work at a fixed or agreed rate or sum subject to such conditions as the Registrar may impose.
(2) The conditions which the Registrar may impose under paragraph (1) shall include conditions requiring the holder of the private bus licence —
(a)
to keep in the private bus at all times a list of names and addresses of adults conveyed regularly on the private bus;
(b)
to keep in the private bus at all times another list of the name or names of the company or companies to and from which the adults are conveyed; and
(c)
to notify the Registrar within a specified period of any change in the particulars referred to in this paragraph.
(3) Where a holder of a private bus licence —
(a)
fails to comply or fails to secure the compliance of any driver employed by him with all or any of the provisions of the Act or these Rules or any condition imposed by the Registrar; or
(b)
fails to provide and maintain adequate and satisfactory service in conveying adults to and from their place or places of work,
the Registrar may, by notice in writing, prohibit the holder of the private bus licence from using his private bus for the conveyance of adults under this rule.