Standards for Air Pollutant Emission from Stationary Pollution Sources Article 10
Those public and private premises that adopt multiple pollution control measures shall submit written data to the local competent authority, and after receiving approval, may build an emissions pipe lower than the specified height designated in Article 9. For circumstances in the foregoing paragraph, emissions standards shall be calculated based on actual emissions pipe height pursuant to Article 9 or official calculations of the highest permissible emissions quantity authorized by the central competent authority. The highest permissible emissions quantities may not exceed the emissions standards for the emission pipes of these Standards.