When a covered employee has received temporary total disability benefits continuously for 6 months, the insurer or self-insurer shall submit to the Commission a vocational rehabilitation progress report on the form that the Commission requires. After submitting a report under subsection (a) of this section, the insurer or self-insurer shall submit further vocational rehabilitation progress reports to the Commission every 120 days or sooner as requested by the Commission. If the Commission finds that an insurer or self-insurer has failed to submit a report within the time period required by this section, the Commission may impose a fine not exceeding $500 on the insurer or self-insurer.