Town and Country Planning Act 1990

19 (1) Where, immediately after the time when the adjustment of claim holdings was completed, any land taken as a whole had an original unexpended balance of established development value, and at any later time (whether before or after the commencement of this Act) an act or event occurs or has occurred in relation to part of that land such that, in accordance with any of the provisions of section 119 and paragraphs 1 to 4, 12 to 14, 16 and 18, an amount is required to be deducted from the original unexpended balance of that part of that land for the purpose of determining whether it has or had an unexpended balance of established development value at any subsequent time, then (without prejudice to the operation of any of those provisions with respect to any part of the land taken separately) the land taken as a whole shall be treated as not having (or as not having had) any such balance at that subsequent time.

(2) Where in accordance with those provisions an amount is required to be deducted from the original unexpended balance of established development value of any land, there shall be attributed to the various parts of that land so much of that amount as might reasonably be expected to have been attributed to it if the authority determining the amount had been required to apportion it between those parts in accordance with the same principles as applied to its determination.

(3) Where two or more acts or events occur or have occurred in relation to the same land (whether before or after the commencement of this Act) such that, in accordance with those provisions, an amount is required to be deducted from the original unexpended balance of established development value of that land or any part of it, those provisions shall apply cumulatively, and the requisite deduction from the original unexpended balance of established development value of that land shall be made by reference to each of those acts or events.