6.—(1) For Article 37(4) of the principal Order (hereditaments) there shall be substituted—
“(4) Regulations may provide that in prescribed cases—
(a)anything which would (apart from the regulations) be one hereditament shall be treated as more than one hereditament;
(b)anything which would (apart from the regulations) be more than one hereditament shall be treated as one hereditament.” .
(2) In Article 50(1)(a)(iii) of the principal Order (alteration in the valuation list by Commissioner) for the words from “of an aggregate amount” onwards there shall be substituted “under Article 40(4)”.