37. Where at any time a registrant, acting in the course of a commercial activity, makes a supply of movable property on behalf of a person who is not a registrant (in this section referred to as the “vendor”) to a recipient and does not disclose to the recipient in writing that he is acting on behalf of a person who is not a registrant,(1) the vendor is deemed not to have made the supply to the recipient;
(2) the registrant is deemed to have made the supply to the recipient; and
(3) the registrant is deemed not to have made a supply to the vendor of a service in relation to the supply to the recipient.