(1)The Third Schedule to the Rating and Valuation Act, 1925 (which specifies the classes of plant and machinery which are required by section twenty-four of that Act to be treated as part of certain hereditaments for the purposes of valuation lists), shall have effect with the addition at the end thereof of the following paragraph:—
“5A pipe-line, that is to say, a pipe or system of pipes for the conveyance of any thing, not being—
(a)a drain or sewer ;
(b)a pipe or system of pipes vested in an area board established by the Gas Act, 1948, or in a board established by the Electricity Act, 1947, or in the Central Electricity Generating Board ;
(c)a pipe or system of pipes forming part of the equipment of, and wholly situate within, a factory or petroleum storage depot or premises comprised in a mine, quarry or mineral field ;
and exclusive of so much of a pipe or system of pipes forming part of the equipment of, and situate partly within and partly outside, a factory or petroleum storage depot or premises comprised in a mine, quarry or mineral field as is situate within, as the case may be, the factory or petroleum storage depot or those premises.
In this paragraph—
(i)' factory' has the same meaning as in the Factories Act, 1961;
(ii)' mine ' and ' quarry ' have the same meanings as in the Mines and Quarries Act, 1954 ;
(iii)' mineral field ' means an area comprising an excavation being a well or bore-hole or a well and borehole combined, or a system of such excavations, used for the purpose of pumping or raising brine or oil, and so much of the surface (including buildings, structures and works thereon) surrounding or adjacent to the excavation or system as is occupied, together with the excavation or system, for the purpose of the working of the excavation or system ;
(iv)' petroleum storage depot' means premises used primarily for the storage of petroleum or petroleum products (including chemicals derived from petroleum) or of materials used in the manufacture of petroleum products (including chemicals derived from petroleum)”.
(2)The Schedule to the Plant and Machinery (Rating) Order, 1960 (which is to the like effect as the said Third Schedule), shall have effect with the insertion, after the paragraph headed " Class 4 " therein, of a paragraph headed " Class 5 ", in the same terms as the paragraph numbered 5 set out in the foregoing subsection.
(3)An alteration in a valuation list made in pursuance of a proposal made for the purpose of giving effect to the amendments made by the foregoing provisions of this section, being an alteration which would by virtue of subsection (1) of section forty-two of the Local Government Act, 1948 (alterations retrospective to beginning of current rate period), be deemed, apart from the provisions of this subsection, to have had effect as from a date before the passing of this Act, shall be deemed to have had effect as from the passing of this Act.