Amendments to the District Zoning Map shall, in addition, include:

1. a legal description and a map of the area sought to be rezoned. The map shall show the relationship of the property to abutting properties;
2. the existing zoning district designation and the proposed district designation; and
3. the names and addresses of all owners of land within the area proposed for rezoning and within 400 feet of the outer limits of the area proposed for rezoning.