(1) Acceptable Quality Level (AQL) means the maximum percentage of failing vehicles that, for purposes of sampling inspection, can be considered satisfactory as a process average.

(2) Axle Ratio means all ratios within ±3% of the axle ratio specified in the configuration in the test order.

(3) Configuration means a subclassification of an engine-system combination on the basis of engine code, inertia weight class, transmission type and gear ratios, axle ratio, and other parameters which may be designated by the Administrator.

(4) Test Sample means the collection of vehicles of the same configuration which have been drawn from the population of vehicles of that configuration and which will receive exhaust emission testing.

(5) Inspection Criteria means the pass and fail numbers associated with a particular sampling plan.

(6) Vehicle means any new production light-duty vehicle as defined in subpart A of this part.

(7) Test Vehicle means a vehicle in a test sample.

(8) In the Hands of the Manufacturer means that vehicles are still in the possession of the manufacturer and have not had their bills of lading transferred to another person for the purpose of transporting.