Section 18A(3) in The West Bengal Premises Tenancy Act, 1956.
(3)If upon an order being made under sub-section (2), the landlord fails or neglects to deliver possession of such premises or such part thereof as is specified in the order to the tenant within the time specified, then the Controller shall execute the order and put the tenant in possession of such premises or such part thereof and in that event the tenant shall be liable to pay fair rent in respect of such premises or such part thereof from the date of delivery of such possession.]