Home › CFR › Title 40 › Part 20340 CFR Part 203 — Low-Noise-Emission Products§ 203.1— Definitions.§ 203.2— Application for certification.§ 203.3— Test procedures.§ 203.4— Low-noise-emission product determination.§ 203.5— Suitable substitute decision.§ 203.6— Contracts for low-noise-emission products.§ 203.7— Post-certification testing.§ 203.8— Recertification.