I don't think this will pass a constitutional challenge ... on both jurisdictional and freedom from unreasonable search and seizure grounds.
My cousin lives in West Vancouver, BC. He just received a notice from his landlord saying that his apartment would be inspected every three months. Apparently The District of West Vancouver Controlled Substance Nuisance Bylaw No. 4417 requires landlords to enter into and inspect the premises of their tenants, supposedly looking for marijuana grow-ops. Granted, grow-ops are a problem in BC but this is the first municipal bylaw (that I know of) that purports to allow a landlord to enter into someone's rented space without any suspicion to check up on them for what are essentially law enforcement purposes. My cousin's a little miffed at this.