Effect of filing. Upon filing of any proceeding before the Board, and during its pendency, all land development pursuant to any challenged Ordinance, order or approval of the Zoning Officer or of any agency or body, and all official action thereunder, shall be stayed unless the Zoning Officer, agency, or body certifies to the Board facts indicating imminent peril to life or property, in which case the development or official action shall not be stayed other than by a restraining order granted by the Board or by a court having jurisdiction of zoning appeals.