“(5) If any of the persons to whom a draft determination was sent under subsection (2) notifies the Commission, in writing, within the period of 10 working days prescribed in subsection (3) that he or she wishes the Commission to hold a conference in relation to the draft determination, the Commission must appoint a date, time, and place for the holding of the conference and give notice of the date, time, and place so appointed to each of the persons to whom a draft determination was sent under subsection (2).