111. (1) The Corporation may, with the previous sanction of the Government, assign names to streets and paint the names or fix the name plates on or at conspicuous places at or near the end, corner or entrance of the street. (2) No person shall destroy, deface or in any way injure any street, name or name plate, or without the previous permission of the Corporation, remove the same. (3) The Corporation may, in the manner provided in the by-laws, lay down street lines and building lines, and may, among other things, require the setting back of buildings to conform to such street lines and building lines. (4) The Corporation may by by-laws define nuisances and offences with regard to streets, and provide for their prevention and abatement