19. Every person who contravenes a provision of a regulation the contravention of which constitutes an offence under paragraph 15 of section 18 is guilty of an offence and liable(1) in the case of a natural person, for a first offence, to a fine of not less than $250 nor more than $750 and, for any subsequent offence, to a fine of not less than $750 nor more than $2,200;
(2) in the case of a legal person, for a first offence, to a fine of not less than $750 nor more than $2,200 and, for any subsequent offence, to a fine of not less than $2,200 nor more than $6,500.