Section 85.1508 - "In Use" inspections and recall requirements(a) Vehicles or engines which have been imported, modified and/or FTP tested by a certificate holder pursuant to § 85.1505 or § 85.1509 may be inspected and emission tested by EPA throughout the useful lives of the vehicles or engines.(b) Certificate holders shall maintain for six years, and provide to EPA upon request, a list of owners of all vehicles or engines imported by the certificate holder under this subpart.(c) A certificate holder will be notified whenever the Administrator has determined that a substantial number of a class or category of the certificate holder's vehicles or engines, although properly maintained and used, do not conform to the regulations prescribed under section 202 when in actual use throughout their useful lives (as determined under section 202(d)). After such notification, the Recall Regulations at 40 CFR part 1068, subpart G, shall govern the certificate holder's responsibilities and references to a manufacturer in the Recall Regulations shall apply to the certificate holder.52 FR 36156, Sept. 25, 1987, as amended at 81 FR 73972 , Oct. 25, 2016