When the efforts of the Commission shall have reached the stage of a tentative plan, the Commission shall hold at least 1 public hearing on each tentative plan to be separately submitted, notice of which hearing shall be published at least 15 days before the date of the hearing in a newspaper of general circulation in the County. The notice shall contain the time and place of hearing, and shall specify the place and times at which the tentative text and maps of the zoning regulations may be examined.