Legal basis: Law of People's Republic of China (PRC) on the Prevention and Control of Environmental Noise Pollution Article 21 The competent department of ecological environment of the people's government at or above the county level and other supervisory and administrative departments and institutions for the prevention and control of environmental noise pollution have the right to conduct on-site inspections of units that emit environmental noise within their jurisdiction according to their respective functions and duties. The units under inspection must truthfully report the situation and provide necessary information. Inspection departments and institutions shall keep technical secrets and business secrets for the inspected units. Inspectors shall show their certificates when conducting on-site inspections.