confronted with the continued and rapid emergence of new psychoactive substances countries in the region have placed additional substances under temporary listing andor extended the scope of drug control to defined groups of substances for instance the republic of korea announced the temporary control of new psychoactive substances synthetic cannabinoids phenethylamines and other miscellaneous substances for three years in december which brought the number of new psychoactive substances currently under temporary control to under that country s act on the control of narcotics the possession management trade assistance in the trade or the giving or receiving of materials that contain a temporary scheduled substance are prohibited