(1)For the purposes of this Part, except section 119, expenditure incurred for the purposes of a trade by a person about to carry it on shall be treated as if it had been incurred by him on the first day on which he does carry it on.
(2)Without prejudice to subsection (1) above, pre-trading expenditure on machinery or plant and pre-trading exploration expenditure shall be treated for the purposes of Chapter I of this Part as incurred on the first day on which the person who incurred the expenditure carries on a trade of mineral extraction.