Section 27-0705. Adoption of rules and regulations; public hearings

A  rule  or regulation or any amendment or repeal thereof shall not be
  adopted until after public hearing thereon. Notice of such hearing shall
  be given at least thirty days prior to the scheduled date of the hearing
  by public advertisement in the area of the state concerned of the  date,
  time, place and purpose of such hearing. At such hearing, opportunity to
  be  heard  shall  be  given  to  the  public. A rule or regulation or an
  amendment or repeal thereof shall not become effective until sixty  days
  after  certified copies thereof shall have been filed with the secretary
  of state.