80Long tenancies at a low rent
(1)In determining whether a long tenancy is, or at any time before the commencement of this Act was.—
(a)a tenancy at a low rent within the meaning of the [1968 c. 23.] Rent Act 1968 or Part I of the [1954 c. 56.] Landlord and Tenant Act 1954; or
(b)a tenancy to which, by virtue of section 12(7) of the Act of 1920, the Rent Acts did not apply;
there shall be disregarded such part (if any) of the sums payable by the tenant as is expressed (in whatever terms) to be payable in respect of rates, services, repairs, maintenance, or insurance, unless it could not have been regarded by the parties as a part so payable.
(2)Nothing in this section shall affect the amount of any payment which a tenant is or was liable to make for any rental period beginning before the commencement of this Act.
(3)In this section—
" long tenancy " means a tenancy granted for a term certain exceeding twenty-one years, other than a tenancy which is, or may become, terminable before the end of that term by notice given to the tenant;
" the Act of 1920 " means the [1920 c. 17.] Increase of Rent and Mortgage Interest (Restrictions) Act 1920 ; and
" the Rent Acts " means the Rent and Mortgage Interest Restrictions Acts 1920 to 1939.