The Principal Act is hereby amended by the insertion after section 3 of the following section:

"Continuing offences.

3A. Where a person, after conviction for an offence under this Act, continues to contravene the provision concerned, he shall be guilty of an offence on every day on which the contravention continues and for each such offence he shall be liable to a fine -

(a) on summary conviction, not exceeding £250, or

(b) on conviction on indictment, not exceeding £5,000.".