(1)No rule of law relating to the validity or enforceability of contracts in circumstances involving illegality is to affect the validity or enforceability of any provision of a domestic tenancy of a dwelling in respect of which a contravention of this Part has occurred.
(2)But periodical payments—
(a)payable in connection with such a tenancy may be stopped in accordance with section 30 (rent stopping orders), and
(b)paid in connection with such a tenancy may be recovered in accordance with sections 32 and 33 (rent repayment orders).