OOSC, Parte II, Punto 6. Sistemas de escape, b. y c. - ubicación del escape

Initial discussion on determining enforcement guidance included a suggestion to seal window / exit above exhaust, however, windows / exits were designed to be open so sealing them could violate other statutes thereby creating a new violation. Due to Operational policy prohibiting the creation of a violation to correct a violation, this option was not feasible. NHTSA representative Nate Seymour subsequently advised that in 1997, requirements were revised to allow school buses to go out of school bus operations into other commerce. There was continued discussion noting that the exemption allowing for this design was for interstate commerce. The buses in question, however, are intrastate and regulations vary by jurisdiction. The committee concluded there would need to be regulatory change to allow the exhaust to discharge in a place not currently allowed by regulation.