Application for authority to acquire or dispose of utility assets or utility securities under § 56-89 shall be by petition to the Commission. The petition may be joint or several. It shall be signed and verified by the president or any vice-president and the secretary or any assistant secretary of the petitioner. The petition shall clearly summarize the object in view, the proposed procedure and the terms and conditions thereof. Upon the filing of the petition, if the Commission shall deem a hearing necessary, the Commission shall assign the matter for prompt hearing. If and when the Commission, with or without hearing, shall be satisfied that adequate service to the public at just and reasonable rates will not be impaired or jeopardized by granting the prayer of the petition, the Commission shall make such order in the premises as it may deem proper and the circumstances require, and thereupon it shall be lawful to do the things provided for in such order, subject, however, to the exception contained in § 56-89 as to counties and municipalities.