Section 7(2)(b) in The Tamil Nadu Buildings (Lease and Rent Control) Act, 1960
(b)save as provided in clause (a), any sum paid in excess of the agreed rent, whether before or after the date of the commencement of this Act, in consideration of the grant, continuance or renewal of the tenancy of the building after the date of such commencement, shall be refunded by the landlord to the person by whom it was paid or, at the option of such person, shall be otherwise adjusted by the landlord.