(a)The Commission shall have authority from time to time to make, issue, amend, and rescind such rules and regulations and such orders as it may deem necessary or appropriate in the public interest or for the protection of investors to carry out the provisions of this subchapter, including rules and regulations defining accounting, technical, and trade terms used in this subchapter. Among other things, the Commission shall have authority, (1) by rules and regulations, to prescribe for the purposes ofthe method (to be fixed in indentures to be qualified under this subchapter) of calculating percentages of voting securities and other securities; (2) by rules and regulations, to prescribe the definitions of the terms “cash transaction” and “self-liquidating paper” which shall be included in indentures to be qualified under this subchapter, which definitions shall include such of the creditor relationships referred to in paragraphs (4) and (6) of subsection (b) ofas to which the Commission determines that the application of subsection (a) ofis not necessary in the public interest or for the protection of investors, having due regard for the purposes of such subsection; and (3) for the purposes of this subchapter, to prescribe the form or forms in which information required in any statement, application, report, or other document filed with the Commission shall be set forth. For the purpose of its rules or regulations the Commission may classify persons, securities, indentures, and other matters within its jurisdiction and prescribe different requirements for different classes of persons, securities, indentures, or matters. (b)Subject to the provisions of chapter 15 of title 44 and regulations prescribed under the authority thereof, the rules and regulations of the Commission under this subchapter shall be effective upon publication in the manner which the Commission shall prescribe, or upon such later date as may be provided in such rules and regulations. (c)No provision of this subchapter imposing any liability shall apply to any act done or omitted in good faith in conformity with any rule, regulation, or order of the Commission, notwithstanding that such rule, regulation, or order may, after such act or omission, be amended or rescinded or be determined by judicial or other authority to be invalid for any reason.