Notice of time, place and purpose of each public hearing held by the Commission shall be given by publication in a newspaper of general circulation in the City at least fifteen (15) days prior to such hearing. When the public hearing is before the Commission on a proposed change, modification or reclassification and the enlargement, expansion and amplification thereof, notice shall be given by the applicant to the Administrator who shall deliver said notice by regular U.S. mail to each property owner whose name and address appears on the list accompanying such application. When notice is required to two hundred (200) or more property owners or residents, alternate forms of procedures which would provide adequate notice may be provided in lieu of mailed notice. In the event the Commission originates, enlarges, extends and amplifies the application for the change, modification or reclassification of property, zone, or land use classification, the Administrator shall be required to ascertain the names and addresses of the last known owners as the same appears on the records of the County Assessor's office of each parcel of land within three hundred feet (300') to the exterior boundaries of the land area sought to be enlarged, extended or amplified. The notice shall give the date, time and place of hearing, the name of the applicant, and relief sought, and identification of the property, and such other facts as may be prescribed by the Commission. The Administrator may, in lieu of notice by mail, order three (3) additional publications, the last publication of such notice must be at least fifteen (15) days before the date set for such hearings. In any public hearing, the presiding officer may order the hearing to be continued by publicly announcing the time and place of continuance, and no further notice thereof shall be required.