53.—(1) Paragraph (2) applies where any rates in respect of a dwelling-house let under a controlled tenancy which is a protected tenancy or a statutory tenancy are borne by the landlord or a superior landlord.
(2) The amount of rates for any rental period which begins after the expiry or termination of a protected tenancy shall be recoverable, without service of any notice of increase, from the tenant in addition to the sums so recoverable apart from this paragraph.
(3) The amount of rates shall be ascertained in accordance with Schedule 3.
(4) Paragraph (2) applies notwithstanding anything in the contract of tenancy.
(5) Where, under a protected or statutory tenancy, the sums payable by the tenant to the landlord include any sums varying according to the cost from time to time of–
(a)any services provided by the landlord or a superior landlord, or
(b)any works of maintenance or repair carried out by the landlord or a superior landlord,
the amount to be registered in the register of rents may be an amount variable in accordance with the terms as to the variation.