The Secretary of Transportation, the Federal Communications Commission, and the Surface Transportation Board shall each maintain, its own regulations with respect to the extension of credit, without security, by any person regulated by the Secretary under subpart II of part A of subtitle VII of title 49, or such Commission or Board, to any candidate for Federal office, or to any person on behalf of such a candidate, for goods furnished or services rendered in connection with the campaign of such candidate for nomination for election, or election, to such office.1