London : Règlement no PS-6, art. 8.1(a) — Fence By-law

No person shall have, erect, construct, maintain or permit to be erected, constructed or maintained any barbed wire fence, except that barbed wire is permitted:

• on a fence erected on land used for agricultural purposes for the keeping of livestock;
• (b) on the top of a fence erected on a lot used for commercial or industrial uses provided that it projects inwards to the area enclosed by the fence; and,
• (c) on the top of a fence erected for security reasons around any facility owned, operated or maintained by any level of government or a utility provider.