CFR›Title 40›Chapter I›Part 610›Subpart D ContainsSections 610.40–610.43CorpusDaily eCFRDisplayed edition2026-05-14Last updated2026-05-14 Subpart D—General Vehicle Test Procedures Sections 610.40 § 610.40 General. 610.41 § 610.41 Test configurations. 610.42 § 610.42 Fuel economy measurement. 610.43 § 610.43 Chassis dynamometer procedures. Previous C Subpart C—Test Requirement Criteria Next E Subpart E—Durability Test Procedures