ii. before 1 January 1990(1) pursuant to an obligation in writing entered into by the taxpayer before 18 June 1987,
(2) that was under construction by or on behalf of the taxpayer on 18 June 1987, or
(3) that is machinery or equipment that is a fixed and integral part of a building, structure, plant facility or other property that was under construction by or on behalf of the taxpayer on 18 June 1987; or