924.0.1. Where, at any time in a taxation year, an individual has received a payment from a registered retirement savings plan or a registered retirement income fund in respect of all or any portion of a premium paid by the individual to a registered retirement savings plan and the payment has been deducted in computing the income of the individual for the year under section 924, the premium or portion thereof, as the case may be, is deemed, for the purposes of sections 931.1 and 961.17.0.1, after that time, not to have been a premium paid by the individual to a registered retirement savings plan.