3(1)A person commits an offence if he publishes or causes to be published an advertisement for the provision for reward of security services by a person who does not hold a licence under this Schedule.N.I.
(2)It is a defence for a person charged with an offence under this paragraph to prove—
(a)that his business is publishing advertisements or arranging for their publication,
(b)that he received the advertisement for publication in the ordinary course of business, and
(c)that he reasonably believed that the person mentioned in the advertisement as the provider of security services held a licence under this Schedule.