4(1)Where, in the case of any premises consisting of a dwelling let on a protected tenancy which is a controlled tenancy, the rent payable in respect of the premises is increased by a section 28 order—
(a)the rent limit under any controlled tenancy of the dwelling for any rental period beginning on or after the date on which that increase takes effect shall be increased by an amount per annum equal to the amount per annum of the increase effected by the order in the rent payable in respect of the dwelling; and
(b)the increase effected by the order in the rent payable in respect of the dwelling for any rental period shall, notwithstanding anything in section 28 of this Act, be recoverable without the service of any notice of increase.
(2)Where, in the case of any premises consisting of a dwelling let on a protected tenancy which is a controlled tenancy, the rent payable in respect of the premises is increased by a section 28 order, the rent limit shall not be increased under section 32 of this Act by reference to any expenditure taken into account by the court in making the order.