Enterprises (whether or not state-owned or –controlled) with special rights and privileges not available to other entities, which influence through their purchases and sales the level or direction of imports of particular products.  (See also P2.) 
Examples:  A statutory marketing board with exclusive rights to control imports of certain grains; a canalizing agency with exclusive right to distribute petroleum; a sole importing agency; or importation reserved for specific importers regarding certain categories of goods.