Under the authority granted to the Commission under § 17–403 of this subtitle, the Commission may adopt regulations governing all publicly owned watershed property acquired by or under the jurisdiction of the Commission. The Commission shall post the watershed regulations at each public recreation site in the watershed areas. The Commission shall publish the watershed regulations at least 30 days before their adoption in at least one newspaper of general circulation in each county of the sanitary district. The posting and publication of the watershed regulations is sufficient notice. The sworn certificate of a commissioner as to the posting and publication of the watershed regulations is prima facie evidence of posting and publication.