2812.1 No person shall modify or alter the exhaust system of a motor vehicle or motorcycle in a manner that will amplify or increase the noise emitted by the vehicle above the level permitted under §2811 of this chapter.

2812.2 No person shall use or operate a motor vehicle or a motorcycle having an exhaust system that has been modified or altered in a manner that will amplify or increase the noise emitted by the vehicle above the level permitted under §2811 of this chapter.

SOURCE: Section 6 of the District of Columbia Noise Control Act of 1977, D.C. Law 2-53, 24 DCR 5293, 5317 (December 30, 1977).