Section 33
SEC. 33. Every order made by the Commission shall be served upon the person or public service affected thereby, within ten days from the time said order is filed, by personal delivery or by ordinary mail, upon the attorney of record, or in case there be no attorney of record, upon the party interested; and in case such certified copy is sent by registered mail, the registry mail receipt shall be prima facie evidence of the receipt of such order by the public service in due course of mail. All orders of the Commission to continue an existing service or prescribing rates to be charged shall be immediately operative; all other orders shall become effective upon the dates specified therein: Provided, however, That orders, resolutions or decisions in controverted matters and not referring to the continuance of an existing service or prescribing rates to be charged shall not be effective unless otherwise provided by the Commission, and shall take effect thirty days after notice to the parties.