This list, "the Inventory of Existing Chemical Substances manufactured or imported in China", was created in order to implement the 2003 version of Measures for the Environmental Management of New Chemical Substances. Before the enactment of the 2003 regulation, if enterprises had been engaged in the manufacturing or import of a chemical substance listed in the above said inventory, they would not need to fulfill the obligation of new chemical substance notification. Otherwise, the enterprise would arrange for the notification or matters of the regulatory exemption according to the 2003 regulation.