The Chinese emission standard for information technology equipment is applied in China through the compulsory certification system rather than as a voluntary reference, so that the limits it sets, and not merely the test method, are a condition of placing most information technology products on the Chinese market. The standard distinguishes two classes of equipment exactly as the international document does, and the class assigned to a product determines both the limits and, in practice, the way the product is documented and installed. Chinese laboratories accredited for this standard issue the reports that the certification bodies accept, and a report produced against the international standard alone is not a substitute, even though the limits are aligned. Manufacturers preparing for the Chinese market typically need a domestic representative and a factory inspection in addition to the test report, and the certification must be renewed periodically.