169. A supply made by a particular non-profit organization established primarily for the benefit of organized labour is exempt where the supply is made to(1) a trade union, association or body referred to in section 172 that is a member of or affiliated with the particular organization; or
(2) another non-profit organization established primarily for the benefit of organized labour,and a supply made by a person referred to in paragraph 1 or 2 is exempt where the supply is made to any such organization.