41.2.1. Where a registrant (in this section referred to as the “auctioneer”), on a particular day, makes a particular supply by auction of prescribed property on behalf of another registrant (in this section referred to as the “mandator”) and, but for section 41.2, that supply would be a taxable supply made by the mandator, section 41.2 does not apply to the particular supply or to any supply made by the auctioneer to the mandator of a service relating to the particular supply where(1) the auctioneer and the mandator jointly elect in prescribed form containing prescribed information in respect of the particular supply; and
(2) all or substantially all of the consideration for supplies made by auction on the particular day by the auctioneer on behalf of the mandator is attributable to supplies of prescribed property in respect of which the auctioneer and the mandator have elected under this section.