79. Any person who constructs a work contemplated in section 71 when the plans and specifications relating thereto have not been approved by the Government, or who fails to maintain the same in conformity with the plans and specifications approved by the Government, is guilty of an offence and liable, upon summary prosecution, in addition to the payment of the costs, to a fine of $100 to $1 000; such penalty may be repeatedly imposed until the offender has complied with his obligation.