(1) In this Act:
"prohibited firearm"—
(a) means—
(i) a firearm described in schedule 1; and
(ii) a firearm prescribed by regulation; and
(iii) something declared to be a prohibited firearm under section 31; and
(b) includes a modified firearm.
Note A prohibited firearm includes a prohibited pistol (see sch 1, items 21 to 23).
(2) However, "prohibited firearm" does not include something declared not to be a prohibited firearm under section 31.
(3) A regulation may amend schedule 1 by—
(a) adding the name or description of a firearm; or
(b) amending a name or description of a firearm to more accurately describe the firearm; or
(c) omitting the name and description of a firearm.
(4) In this section:
"modified firearm" means a firearm that would be a prohibited firearm if—
(a) it did not have something missing from it, or a defect or obstruction; or
(b) something had not been added to it.