Subject to such terms and conditions as the Public Utility Commission may prescribe, the commission, by rule or order, may exempt the following from any or all of the provisions of ORS 757.400 to 757.480, if the commission finds that application of the law is not required by the public interest:
(1) Any stocks and bonds, notes or other evidences of indebtedness and any other security or guarantee or class of securities or guarantees for which commission authorization would otherwise be required prior to the issuance, incurrence or assumption thereof.
(2) Any public utility or class of public utilities.