20.— (1) A person guilty of an offence under section 18 or 19 shall be liable—

(a) on summary conviction, to a fine not exceeding €3,000 or imprisonment for a term not exceeding 6 months or both, or

(b) on conviction on indictment, to a fine not exceeding €30,000 or imprisonment for a term not exceeding 3 years or both.

(2) If the offence under section 18 or 19 of which a person was convicted is continued after conviction, that person shall be guilty of a further offence on every day on which the act or omission constituting the offence continues, and for each such further offence the person shall be liable on summary conviction to a fine not exceeding €500 or on conviction on indictment to a fine not exceeding €5,000.

(3) Proceedings for an offence under section 18 or 19 may be brought and prosecuted by the Minister.