(a) This subpart describes the equipment and the procedures required to perform idle exhaust emission tests on heavy-duty engines and light-duty trucks. Subpart A of this part sets forth the testing requirements, reporting requirements and test intervals necessary to comply with EPA certification procedures.

(b) Four topics are addressed in this subpart. Sections 86.1505 through 86.1515 set forth specifications and equipment requirements; §§86.1516 through 86.1526 discuss calibration methods and frequency; test procedures and data requirements are listed in §§86.1527 through 86.1542 and calculation formulas are found in §86.1544.

[59 FR 48536, Sept. 21, 1994, as amended at 60 FR 34376, June 30, 1995. Redesignated at 73 FR 37194, June 30, 2008]