((a)) The Attorney General may prescribe only such rules and regulations as are necessary to carry out the provisions of this chapter, including—
((1)) regulations providing that a person licensed under this chapter, when dealing with another person so licensed, shall provide such other licensed person a certified copy of this license;
((2)) regulations providing for the issuance, at a reasonable cost, to a person licensed under this chapter, of certified copies of his license for use as provided under regulations issued under paragraph (1) of this subsection; and
((3)) regulations providing for effective receipt and secure storage of firearms relinquished by or seized from persons described in subsection (d)(8) or (g)(8) of section 922.
((b)) The Attorney General shall give not less than ninety days public notice, and shall afford interested parties opportunity for hearing, before prescribing such rules and regulations.
((c)) The Attorney General shall not prescribe rules or regulations that require purchasers of black powder under the exemption provided in to complete affidavits or forms attesting to that exemption.