Summary
This regulation (40 CFR Part 1065) establishes detailed test procedures for measuring exhaust emissions from various engine categories including locomotives, heavy-duty highway engines, nonroad diesel engines, marine engines, and small spark-ignition engines. It specifies laboratory and field testing methodologies, sampling techniques (continuous, batch, or combined), duty cycles, and statistical requirements for validating alternate procedures. The rule primarily binds manufacturers to demonstrate compliance with EPA emission standards through prescribed measurement protocols.
Reason
This micromanagement of testing methodology imposes massive compliance costs on manufacturers—especially small businesses—while doing nothing that couldn't be achieved through private standards bodies or state-level oversight. The complex statistical validation requirements create barriers to innovation, protect incumbent manufacturers who can afford the overhead, and exceed any legitimate federal role under the Commerce Clause. The 'procedures' represent the very essence of regulatory capture: foxes designing a henhouse where the EPA mandates exactly how private firms must prove they're following EPA's own rules, inflating costs without demonstrable environmental benefit that couldn't be achieved through simpler, market-driven certification systems.