350.3. Where at any time a registrant accepts, in full or partial consideration for a taxable supply of property or a service, other than a zero-rated supply, a coupon that entitles the recipient of the supply to a reduction of the price of the property or service equal to a fixed dollar amount specified in the coupon (in this section referred to as the “coupon value”) and the registrant can reasonably expect not to be paid an amount for the redemption of the coupon by another person, the registrant shall treat the coupon(1) as reducing the value of the consideration for the supply as provided for in section 350.4, where subsection 4 of section 181 of the Excise Tax Act (Revised Statutes of Canada, 1985, chapter E-15) applies to the coupon; or
(2) as a partial cash payment that does not reduce the value of the consideration, in which event section 350.2 applies and the registrant may claim an input tax refund for the reporting period of the registrant that includes that time equal to the amount obtained by multiplying the coupon value by the tax fraction relating to the property or service in respect of which the coupon is used.