Great advice from Jadero. As an Ontario renter, my experience is that landlords can put many things in the lease (i.e., there aren’t laws that say a discretionary term, such as ‘no pets whatsoever’, would invalidate the lease or entitle the renter to compensation). But whether it’s enforceable (i.e., whether the landlord could use that lease agreement to collect damages from and/or evict you if you violate the discretionary addition) is another story that probably favours you in the case of wall hangings.

A separate but related issue is that landlords who put unnecessarily constraining discretionary terms in the lease agreement may be a warning sign that they’re not the most attractive landlords