(3) Where a person fails to comply with a request under subsection (1) to attend a conference, the Commissioner may issue a summons requiring the person to attend a conference at a time and place to be specified in the summons.
(4) Subsections (1), (2), (3), and (5) of section 20 of the Summary Proceedings Act 1957 shall apply to a summons under this section as if it were a witness summons issued under that section.