(1) An operator may not knowingly permit a leased space at a self-storage facility to be used for residential purposes. (2) A renter may not use a leased space for residential or other unlawful purposes.
Self-Storage Use -- Prohibition On Residential Or Other Unlawful Purposes
Mont. Code Ann. § 70-6-603, under Self-Storage Facilities Act.
Mont. Code Ann. § 70-6-603