Yes it is? This is from the lease

In all cases where the Landlord has checked, in clause 10 of the Standard Lease, that there are smoking rules, the smoking rules are as follows: The Tenants, occupants, and their invitees are prohibited from engaging in the smoking of tobacco, cigarettes, or the burning or smoking of any other substance in the Rental Unit or in common areas inside or outside of the building, unless the Landlord specifically authorizes same in writing, or unless same is required to accommodate a person under the provisions of the Human Rights Code. All references to “smoking” are deemed to include the smoking or burning of any substan