; and (2) by striking paragraphs (2) and (3). (b) Effective date The amendment made by subsection (a) shall apply with respect to any violation that occurs after the date that is 60 days after the date of enactment of this Act. 10. Regulating inoperable pistols and harmonizing definitions for certain types of firearms Section 1 of the Act of July 8, 1932 (47 Stat. 650, chapter 465; sec. 22–4501, D.C. Official Code), is amended— (1) by redesignating paragraph (1) as paragraph (1)(A); (2) by inserting before paragraph (1)(A), as redesignated, the following: (1) Chief shall have the same meaning as provided in section 101(4) of the Firearms Control Regulations Act of 1975 (sec. 7–2501.01(4), D.C. Official Code). ; (3) by inserting after paragraph (2) the following: (2A) Firearm — (A) means any weapon, regardless of operability, which will, or is designed or redesigned, made or remade, readily converted, restored, or repaired, or is intended to, expel a projectile or projectiles by the action of an explosive; and (B) does not include— (i) a destructive device, as defined in section 101(7) of the Firearms Control Regulations Act of 1975 (sec. 7–2501.01(7), D.C. Official Code); (ii) a device used exclusively for line throwing, signaling, or safety, and required or recommended by the Coast Guard or Interstate Commerce Commission; or (iii) a device used exclusively for firing explosive rivets, stud cartridges, or similar industrial ammunition and incapable for use as a weapon. ; (4) by inserting after paragraph (3) the following: (3A) Licensee means an individual holding a valid license issued under the provisions of section 6 of the Act of July 8, 1932 (sec. 22–4506, D.C. Official Code). ; (5) by striking paragraph (4) and inserting the following: (4) Machine gun shall have the same meaning as provided in section 101(10) of the Firearms Control Regulations Act of 1975 (sec. 7–2501.01(10), D.C. Official Code).