820. New restricted contracts limited to transitional cases.

A tenancy1 or other contract entered into on or after 15 January 19892 cannot be a restricted contract for the purposes of the Rent Act 19773 unless it is entered into in pursuance of a contract made before that date4. If the terms of a restricted contract are varied on or after that date, then:

  1.  

    (1)     if the variation affects the amount of the rent5 which, under the contract, is payable for the dwelling in question