PART IIIDetermination of Rateable Value
16In the case of a water undertaking wholly situated within a rating area the cumulo rateable value for the year 1967-68 or any subsequent year, as ascertained under the foregoing provisions of this Schedule, shall be taken to be the rateable value of that undertaking for that year and the Assessor shall enter that value in the valuation roll.
17In the case of a water undertaking situated within more than one rating area the Assessor shall for the year 1967-68 and each subsequent year determine in accordance with the following provisions of this Part of this Schedule the rateable value attributable to a water undertaking in respect of such parts of the undertaking as are situated within such an area, and shall enter that value in the valuation roll.
18For the purposes of this Part of this Schedule the capital works of each water undertaking shall be divided into productive and distributive parts in such manner as may be prescribed by order made by the Secretary of State.
19Not later than 31st December in any calendar year, commencing with the year 1966, each water authority shall ascertain and certify to the Assessor—
(a)the capital expenditure in respect of the productive part of the undertaking in each of the rating areas and, where appropriate, the separately rated areas in which the undertaking is situated ; and
(b)the income for the previous year from public water rate, domestic water rate and water charges derived from each rating area in which any portion of the distributive part of the undertaking is situated.
20The cumulo rateable value of each water undertaking, as ascertained under the foregoing provisions of this Schedule, shall then be apportioned between the productive and distributive parts of the undertaking in such proportion as the Secretary of State may, in such manner as he thinks fit, by order determine.
21(1)The amount of the cumulo rateable value apportioned to the productive part of the undertaking shall be apportioned among the rating areas in which any portion of that part is situated in such proportion as the capital cost of that portion bears to the capital cost of that part.
(2)The amount of the cumulo rateable value apportioned to the distributive part of the undertaking shall be apportioned among the rating areas in which any portion of that part is situated in such proportion as the aggregate income from the public water rate, domestic water rate and water charges derived from a rating area bears to such income derived from the whole of the area in which the distributive part of the undertaking is situated.
(3)The aggregate of the amounts duly apportioned as aforesaid in respect of each water undertaking shall then be taken to be the rateable value attributable to that undertaking in the rating area concerned.
22Where a rating area has within it separately rated areas the rateable value of a water undertaking as ascertained under the foregoing provisions of this Part of this Schedule shall be apportioned between those areas on such basis as may be determined by the Assessor who shall enter the resultant apportioned values in the valuation roll.
23The Assessor shall no longer be required under section 23 of the [1854 c. 91.] Lands Valuation (Scotland) Act 1854 to apportion the cumulo rateable value of a water undertaking as between the various parishes in which the undertaking is situated or to enter such apportioned value in the valuation roll.