This three-part paper, deals with the different rules that govern who may or may not enter leased property. Each section surveys the statutory provisions (regulating the issue in question) of various jurisdictions throughout Canada at the time of publication, and lists issues relating to the question covered in the section. The first section of the paper addresses the right of the tenant to exclude entry by the landlord and his or her agents. The second section deals with the question of adding to or changing the security devises on a property (especially locks). If a landlord “changes the locks on a tenant,” it amounts to a constructive eviction, and if a tenant “changes the locks,” it may prevent the landlord from fulfilling his or her duties, especially in the case of emergencies. When many tenants share a large building, there is usually some element of security which restricts access to that building. Since the landlord controls access to the building, he or she will also determine the circumstances under which “tradesmen” [sic] and political canvassers can have access to the occupants of the building. This section of the paper addresses this issue, and whether it should be regulated by statute in Alberta.