41 Section 14L has to be understood in the context of the meaning of "land value" (s 6A) and "land improvements" (s 4(1)) as follows:
6A(1) The land value of land is the capital sum which the fee-simple of the land might be expected to realise if offered for sale on such reasonable terms and conditions as a bona-fide seller would require, assuming that the improvements, if any, thereon or appertaining thereto, other than land improvements, and made or acquired by the owner or the owner's predecessor in title had not been made.
4(1) Land improvements means:
(a) the clearing of land by the removal or thinning out of timber, scrub or other vegetable growths,
(b) the picking up and removal of stone,
(c) the improvement of soil fertility or the structure of soil,
(d) the restoration or improvement of land surface by excavation, filling, grading or levelling, not being works of irrigation or conservation,
(d1) without limiting paragraph (d), any excavation, filling, grading or levelling of land (otherwise than for the purpose of irrigation or conservation) that is associated with:
(i) the erection of any building or structure, or
(ii) the carrying out of any work, or
(iii) the operations of any mine or extractive industry,
(e) the reclamation of land by draining or filling together with any retaining walls or other works appurtenant to the reclamation, and
(f) underground drains.