Section 12(2) in The West Bengal Premises Tenancy Act, 1997
(2)Notwithstanding anything in any other law for the time being in force, a tenant may give up possession of the premises on giving such notice as is required under the contract creating the tenancy. In the absence of any provision in the contract relating to notice or when there is no contract, the tenant may give up possession of the premises on giving not less than one month's notice expiring with a month of the tenancy.
