If the landlord and tenant fail to establish a default extension period for the lease in the rental agreement and neither party gives a 30-day written notice to the other to terminate the tenancy before the rental agreement's original termination date, the tenancy continues on a month-to-month basis.
Mont. Code Ann. § 70-24-205
Extension of written rental agreements
Known as the The Montana Residential Landlord and Tenant Act
The act spans §§ 70-24-101 to 70-24-442 (62 sections).
En
Official source: Montana Code Annotated (Montana Legislature). Reproduced from public-domain Montana statutes; confirm against the official source for the current text. Not legal advice.