Intermediary services definition clarified: intermediary facilitates a third-party main supply and excludes suppliers acting on their own account. Intermediary means a broker, agent or similar person who arranges or facilitates a main supply of goods, services or securities between two or more other persons and does not include a person who supplies the main supply on his own account; intermediary arrangements involve two distinct supplies - the main supply between principals and the ancillary facilitation service - require a minimum of three parties, and exclude subcontractors or service providers who supply the main service on a principal-to-principal basis.