Section 43 of the Act of 1971 (amount to be registered as rent) shall have effect as if after subsection (1) there were inserted the following subsections—
“(1A)Subject to subsection (1B) below, there shall be noted on the register the amount, if any, of the registered rent which, in the opinion of the rent officer or rent assessment committee, is fairly attributable to the use of furniture or the provision of services or to the use of part of the premises comprised in a dwelling-house as a shop or office or for business, trade or professional purposes.
(1B)It shall not be necessary to note on the register under subsection (1A) above any amount which in the opinion of the rent officer or, as the case may be, the rent assessment committee is negligible.”