(a) Issuance of regulations; exemptions The Bureau is authorized to prescribe such rules and regulations, to make such interpretations, and to grant such reasonable exemptions for classes of transactions, as may be necessary to achieve the purposes of this chapter. (b) Liability for acts done in good faith in conformity with rule, regulation, or interpretation No provision of this chapter or the laws of any State imposing any liability shall apply to any act done or omitted in good faith in conformity