8(1)For each year after the period of occupation there shall be assessed the following values, that is to say,—E+W+S
(a)the current value, as at the end of the period of occupation, of the expectation of making a profit for that year assessed in accordance with sub-paragraph (3) of the last preceding paragraph, and
(b)the current value, as at the end of the period of occupation, of the expectation of making a profit for that year assessed in accordance with sub-paragraph (2) of that paragraph.
(2)If the aggregate of the values assessed in accordance with head (a) of the preceding sub-paragraph is less than the aggregate of the values assessed in accordance with head (b) thereof, the mineral operator shall be entitled to compensation of an amount equal to the difference.