When any railroad is operated by a trustee or receiver, the duties and liabilities imposed and the rights conferred by sections 13b-299 to 13b-303, inclusive, upon companies are imposed and conferred upon such trustee or receiver. Each order of the Commissioner of Transportation upon such trustee or receiver shall be served by some indifferent person, by leaving a true and attested copy of such order, with or at the usual place of abode of such trustee or receiver, within six days of the date thereof.