For the purposes of this Schedule—

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• “limits of supply” has the meaning assigned to it by section 5(3) of the M1Water (Scotland) Act 1946;

• “public water rate” and “domestic water rate” have the meanings assigned to them by section 1 of the M2Water (Scotland) Act 1949;

• “rating area” means the area F2of an islands council or of a district council;

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• “unit” means a thousand gallons of water;

• F4 “ valuation roll ” means the roll made up by the Assessor under the Valuation Acts;

references to the supply of water in bulk are references to a supply taken by a local water authority for augmenting or constituting the supply to be given by them.