Section 9(1)(a) in Assam Non-Agricultural Urban Areas Tenancy Act, 1955
(a)that the rent previously payable for the holding shall not be enhanced by more than three annas in the rupee, but if at any time ' the land revenue due to Government or the ground rent due to a proprietor is increased, then the tenant shall be liable to pay in addition to the enhanced rent, if any, an amount equal to the total amount of land revenue or ground rent paid by the landlord in excess of the amount paid previously ;