81. Every person who contravenes any provision of sections 5, 11, 17, 18, 20, 21, the second paragraph of section 22, sections 23, 24, 27, 29, 36, 40 to 42, 45, 47 or 61, the second paragraph of section 48, the first paragraph of section 68, the second paragraph of section 76 or 77, is guilty of an offence and is liable to a fine of not less than $1,000 nor more than $2,000 in the case of a natural person, and of not less than $5,000 nor more than $10,000 in the case of a legal person.