666. The rebate to which a person is entitled in respect of a specified single unit residential complex under sections 664 and 665 is equal to(1) where the construction or substantial renovation of the complex is at least 25% but not more than 50% completed on 1 July 1992 and possession is transferred before 1 October 1992, 50% of the estimated tax for the complex;
(2) where the construction or substantial renovation of the complex is more than 50% completed on 1 July 1992 and(a) possession is transferred before 1 October 1992, 66 2/3% of the estimated tax for the complex, or
(b) possession is transferred before 1 January 1993, 33 1/3% of the estimated tax for the complex; and
(3) where the construction or substantial renovation of the complex is substantially completed on 1 July 1992 and possession is transferred after 1992 but before 1 January 1996, 33 1/3% of the estimated tax for the complex.