Within forty-five (45) days after the filing of an application or, in the event that the record is left open by the Commission, within fifteen (15) days after the close of the record, whichever occurs later, the Commission shall publish its findings, conclusions, and decision, except as provided in Subsections (d) and (e) of this Section. No record shall be held open for longer than seven (7) calendar days. The Commission's decision shall instruct the Director to: Issue the permits; Issue the permit subject to any conditions necessary to insure conformance with the provisions and purposes of this Subtitle; or Deny the permit. The Commission's findings, conclusions, and decision shall be mailed to the applicant and sent to the Director, the Planning Board, any appropriate municipality and, upon request, to any other interested person. If, after a public appearance, the Commission finds that denial of the permit will result in the denial of all reasonable use of the property, or will impose undue hardship on the owner, there shall be a period of one hundred twenty (120) days after such finding to allow for the development of an economically feasible plan for the preservation of the structure. If, at the end of such period, no plan has been found, the Commission shall, with or without further public appearance, instruct the Director to issue a permit, with any conditions which will further the intent and purpose of this Subtitle. Failure of the Commission to act on an application within the time periods provided in this Section shall be considered as authorization by the Commission to issue the permit. The time period for Commission action may be extended with the written consent of the applicant.