Prior to the adoption of any regulation under subsection (d) of section 26-142a or section 26-159a, the commissioner or his designated representative shall conduct a public hearing or hearings in those coastal areas where persons substantially affected by such regulation and having an interest therein may be heard. The commissioner shall cause notice of such hearing or hearings to be published at least once not more than thirty days and not fewer than ten days before the date set for such hearing or hearings in a newspaper or newspapers having general circulation in those areas which may be affected by such regulation.