1. The rent payable in relation to a premises is —
(a) the rent agreed by the landlord and the tenant as provided in Schedule I; or
(b) the standard rent specified under section 7, as revised under section 9.
2. If the landlord wants to enhance the rent in case of a tenancy which has been entered into before the commencement of this Act, the landlord may do so by giving a written notice to the tenant within three months from the date of such commencement. The enhancement has to be in tune with section 7. The rent so enhanced, is payable from the date of such commencement.