143.1.A supply made by a public institution of an admission to a fund-raising dinner, ball, concert, show or like fund-raising activity is exempt where part of the consideration for the supply may reasonably be regarded as an amount that is donated to the institution and in respect of which a receipt referred to in section 712 or 752.0.10.3 of the Taxation Act (chapter I-3) may be issued or could be issued if the recipient of the supply were an individual.