The provisions of this chapter shall not apply to the sale or other disposition of any stock or stock certificate or other evidence of interest or ownership, or bond, note or other evidence of indebtedness, which may be held in the treasury of a public service company if title thereto, or possession by pledge thereof, shall have at some previous time once lawfully passed from such public utility company, nor to the issuance of bonds, notes or other evidences of indebtedness, payable at a period of less than twelve months, nor to the pledging or replacing of stocks, trust certificates, bonds, or other evidences of indebtedness to secure such bonds, notes, or evidences of indebtedness, payable at periods of less than twelve months; but if such bonds, notes, or other evidences of indebtedness shall, in whole or in part, directly or indirectly, be refunded by any issue of bonds, notes, or other evidences of indebtedness running for twelve months or more then the aforesaid mentioned provisions with regard to certificates of public convenience and applications therefor shall apply to such refunding.