Subject to the requirements of this chapter any public utility, organized and existing or incorporated under the laws of this State and doing business in the State, may issue stocks, bonds which may be secured by mortgages on its property, franchises or otherwise, notes or other evidences of indebtedness payable at periods of more than 12 months after the date of issuance, when necessary for: [1987, c. 141, Pt. A, §6 (NEW).]