Lamp in certain cases may be dispensed with.

4. Notwithstanding anything to the contrary in the thirty-fifth section of the "Licensing Ordinance 1865" it shall be lawful for the Superintendent upon the recommendation in writing of the Commissioner of Police to exempt the holder of a general license for any premises situated within the boundaries of the City of Dunedin or within the boundaries of any incorporated town in the said Province from keeping a lamp affixed over the principal door of his house or within twenty feet thereof and from keeping the same burning from sunset to sunrise.