Not more than sixty (60) days after:
the commissioner may, if deemed necessary because the commissioner believes that one (1) or more of the findings listed in section 6 of this chapter may be made, conduct a public hearing or allow public comment for a period of not more than sixty (60) days to afford interested persons an opportunity to present information, views, arguments, or comments in regard to the proposed plan.
IC 27-14.5-4-2