Income Tax Act — I-3.3 66.2
 formula (D − E) − (F − G − H) where D is the total of the amounts determined for E to O in the definition cumulative Canadian development expense in subsection (5) at the end of the taxation year, E is the total of the amounts determined for E to O in the definition cumulative Canadian development expense in subsection (5) at the beginning of the taxation year, F is the total of the amounts determined for A to D.1 in the definition cumulative Canadian development expense in subsection (5) at the end of the taxation year, G is the total of the amounts determined for A to D.1 in the definition cumulative Canadian development expense in subsection (5) at the end of the preceding taxation year, and H is the amount determined for B, and (e) the amount determined by the formula A(B − C) where A is (i) for taxation years that end before 2030, 15%, (ii) for taxation years that begin before 2030 and end after 2029, the amount determined by the formula 0.15(I/J) + 0.075(K/J) where I is the total of all reaccelerated Canadian development expenses incurred by the taxpayer before 2030 and in the taxation year, J is the total of all reaccelerated Canadian development expenses incurred by the taxpayer in the taxation year, and K is the total of all reaccelerated Canadian development expenses incurred by the taxpayer after 2029 and in the taxation year, and (iii) for taxation years that begin after 2029, 7.5%, B is the total of all reaccelerated Canadian development expenses incurred by the taxpayer in the taxation year, and C is the amount determined by the formula (D − E) − (F − G − H) where D is the total of the amounts determined for E to O in the definition cumulative Canadian development expense in subsection (5) at the end of the taxation year, E is the total of the amounts determined for E to O in the definition cumulative Canadian development expense in subsection (5) at the beginning of the taxation year, F is the total of the amounts determined for A to D.1 in the definition cumulative Canadian development expense in subsection (5) at the end of the taxation year, G is the total of the amounts determined for A to D.1 in the definition cumulative Canadian development expense in subsection (5) at the end of the preceding taxation year, and H is the amount determined for B. Definitions (5) In this section, accelerated Canadian development expense , of a taxpayer, means any cost or expense incurred by the taxpayer during a taxation year if the cost or expense (a) qualifies as a Canadian development expense at the time it is incurred, other than (i) an expense in respect of which the taxpayer is a successor, within the meaning of subsection 66.7(4), and (ii) a cost in respect of a Canadian resource property acquired by the taxpayer, or a partnership in which the taxpayer is a member, from a person or partnership with which the taxpayer does not deal at arm’s length, (b) is incurred after November 20, 2018 and before 2025, and (c) if the Canadian development expense is deemed to be a Canadian development expense incurred by the taxpayer because of paragraph 66(12.63)(a), is an amount renounced under an agreement entered into after November 20, 2018; ( frais d’aménagement au Canada accélérés ) Canadian development expense of a taxpayer means any cost or expense incurred after May 6, 1974 that is (a) any expense incurred by the taxpayer in (i) drilling or converting a well in Canada for the disposal of waste liquids from an oil or gas well, (ii) drilling or completing an oil or gas well in Canada, building a temporary access road to the well or preparing a site in respect of the well, to the extent that the expense was not a Canadian exploration expense of the taxpayer in the taxation year in which it was incurred, (iii) drilling or converting a well in Canada for the injection of water, gas or any other substance to assist in the recovery of petroleum or natural gas from another well, (iv) drilling for water or gas in Canada for injectio