Regulations made for the purposes of this Part may, without limitation—
(a)
prescribe circumstances in which a person will be taken to have a lawful
excuse in relation to an act or omission referred to in section 21C or
21E; and
(b)
provide that this Part or specified provisions of this Part do not apply to a
specified class of persons; and
(c)
provide that this Part or specified provisions of this Part do not apply to a
specified class of weapon, implement or article; and
(d)
prescribe evidentiary provisions to facilitate proof of an offence against
this Part.