23.—(1) A person who, being the holder of a licence for a sex establishment—N.I.
(a)without reasonable excuse knowingly permits a person under 18 years of age to enter the establishment; or
(b)employs a person known to him to be under 18 years of age in the business of the establishment,
shall be guilty of an offence.
(2) A person guilty of an offence under this paragraph shall be liable on summary conviction to a fine not exceeding £20,000.