(a) Each of the companies over which the commission has jurisdiction shall be required to furnish the commission a list of any stocks and bonds the issuance of which is contemplated.

(b) It shall be unlawful for any of such companies to issue stocks, bonds, notes, or other evidences of debt, payable more than 12 months after the date of issuance, except upon the approval of the commission, and then only when necessary and for such amount as may be reasonably required for the acquisition of property; the construction and equipment of power plants and carsheds; the completion, extension, or improvement of its facilities or properties; the improvement or maintenance of its service; the discharge or lawful refunding of its obligations; or other lawful corporate purposes falling within the spirit of this Code section.

(c) The decision of the commission shall be final as to the validity of the issuance of stocks, bonds, notes, or other evidences of debt by companies under the jurisdiction of the commission.

(d) Before issuing stocks, bonds, notes, or other evidence of debt, a company under the jurisdiction of the commission shall secure an order from the commission authorizing such issue, the amount thereof, and the purpose and use for which the issue is authorized. For the purpose of enabling it to determine whether such order should be issued, the commission shall make such inquiry or investigation, hold such hearings, and examine such witnesses, books, papers, documents, or contracts as it may deem advisable or necessary.

(e) Notwithstanding any other provision of this Code section, a company under the jurisdiction of the commission may issue notes or other evidences of debt for proper and lawful corporate purposes, payable at periods of not more than 12 months from the date of issuance, without the consent of the commission, provided that no such notes or other evidences of debt shall, in whole or in part, directly or indirectly, be refunded by any issue of stocks, bonds, or other evidences of debt running for more than 12 months without the consent of the commission.

(f) Notwithstanding any other provision of this Code section, motor common carriers and motor contract carriers regulated under Chapter 7 of this title shall be exempt from the provisions of this Code section.