80.3. Where a sponsor of a convention makes a taxable supply by way of lease, licence or similar arrangement to a person not resident in Québec of an immovable that is acquired by the person exclusively for use as a site for the promotion, at the convention, of a business of, or of property or services supplied by, the person, no tax is payable in respect of that supply to the person or in respect of any supply by the sponsor to the person of property or services that are acquired by the person for consumption or use as related convention supplies in respect of the convention.