4. Where the subject of the proceedings is under the Rates (Northern Ireland) Order 1972 property which is not treated as a hereditament, its value shall, where the property is not valued by a court valuer or sold in the course of the proceedings be taken, subject to any direction of the Judge, to be an amount which is equal to forty times the amount which the Commissioner of Valuation certifies would be entered in the valuation list as its net annual value if it were so treated and if it had been valued under the enactments repealed by that Order.