66.1.Where a charity or a public institution makes a taxable supply of property or a service to another person, where the value of the property or service is included in determining the amount of the advantage in respect of a gift by the other person to the charity or public institution under section 7.22 of the Taxation Act (chapter I-3) and where a receipt referred to in section 712 or 752.0.10.3 of that Act may be issued, or could be issued if the other person were an individual, in respect of part of the consideration for the supply, the value of the consideration for the supply is deemed to be equal to the fair market value of the property or service at the time the supply is made.