The defences

Exempt trades.
3
1
It is a defence for a person charged with an offence under section 1 to prove that—
a
the knife was marketed—
i
for use by the armed forces of any country;
ii
as an antique or curio; or
iii
as falling within such other category (if any) as may be prescribed;
b
it was reasonable for the knife to be marketed in that way; and
c
there were no reasonable grounds for suspecting that a person into whose possession the knife might come in consequence of the way in which it was marketed would use it for an unlawful purpose.
2
It is a defence for a person charged with an offence under section 2 to prove that—
a
the material was published in connection with marketing a knife—
i
for use by the armed forces of any country;
ii
as an antique or curio; or
iii
as falling within such other category (if any) as may be prescribed;
b
it was reasonable for the knife to be marketed in that way; and
c
there were no reasonable grounds for suspecting that a person into whose possession the knife might come in consequence of the publishing of the material would use it for an unlawful purpose.
3
In this section “prescribed” means prescribed by regulations made by the Secretary of State.