In this Part of this Act "original unexpended balance of established development value in relation to any land, means the unexpended balance of established development value which that land had immediately after the time when, in accordance with section 138 of this Act, the adjustment of claim holdings is deemed to have been completed.
For the purposes of this Part of this Act land shall be taken to have had such a balance if, immediately after the time referred to in subsection (1) of this section—
Where subsection (2) of this section applies, there shall be attributed to the land referred to in that subsection—
and the original unexpended balance of established development value of that land shall be taken to have been an amount equal to eight-sevenths of the amount or aggregate amount so attributed.