Versions of s. 259(6.1)(d)
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throughout the specified period, the percentages — being the specified percentage, the specified provincial percentage or any other percentage specified in this section or in a regulation made under this Part that applies for the purposes of this section — that would be applicable in determining the amount of a rebate under this section in respect of the property or service, if tax in respect of the property or service had become payable and had been paid by the person on each day in the specified period, remain constant.