The Board may, from time to time, call public hearings to ascertain whether the public necessity, health, safety, or welfare requires the removal of poles, overhead wires, and associated overhead structures within designated areas of the unincorporated area of the County and the underground installation of wires and facilities for supplying electric, communication, or similar or associated service. The Clerk shall notify all affected property owners, as shown on the last equalized assessment roll, and utilities concerned by mail of the time and place of such hearings at least ten (10) days prior to the date thereof. Each such hearing shall be open to the public and may be continued from time to time. At each such hearing all persons interested shall be given an opportunity to be heard. The decision of the Board shall be final and conclusive. (§ 2, Ord. 596)