Changes after certification.

The aftermarket part manufacturer shall be required to recertify any part which: (a) Was certified pursuant to § 85.2114(b) and to which modifications are subsequently made which could affect the results of any test or judgment made that the part meets all of the applicable Emission-Critical Parameters; (b) Was certified pursuant to § 85.2114(c) and to which modifications are made which are likely to affect emissions or the capability of the part to meet any other requirement of this subpart; or (c) Was certified and is subsequently modified in a manner affecting the durability of the part or any emission control device, engine or the vehicle upon which such part is installed. [45 FR 78461, Nov. 25, 1980, as amended at 54 FR 32593, Aug. 8, 1989]