By mailing, 10 days prior to said hearing, postage prepaid, to the owners of property within a radius of 300 feet of the exterior boundaries of the property involved in the application, using for this purpose the last known name and address of such owners as shown upon the current tax assessor’s records. The list of property owners addresses shall be typed upon gummed labels, together with required postage. The list shall be prepared and certified by the applicant, or a title insurance company, civil engineer or surveyor licensed to practice in California. The notice shall state the nature of the request, location of the property (text or diagram), the date, time, and place of the scheduled hearing, and the hearing body; or, in the event that the number of owners and tenants to whom notice would be sent is greater than 1,000, notice may be given at least 10 days prior to the hearing by placing a display advertisement of at least 1/8 page in the newspaper of general circulation within the area affected by the proposed action. The notice shall state the nature of the request, the location of the property (text or diagram), the date, time, and place of the scheduled hearing, and the hearing body; and