StacksVerified U.S. regulatory reference

40 CFR §1068.405

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov
  1. (a)In the test order, we will specify the following things:
    1. (1)The family we have identified for testing. We may also specify individual configurations.
    2. (2)The engine/equipment assembly plant, storage facility, or (if you import the engines/equipment) port facility from which you must select engines/equipment.
    3. (3)The procedure for selecting engines/equipment for testing, including a selection rate.
    4. (4)The test procedures, duty cycles, and test points, as appropriate, for testing the engines/equipment to show that they meet emission standards.
  2. (b)We may state that we will select the test engines/equipment.
  3. (c)We may identify alternate families or configurations for testing in case we determine the intended engines/equipment are not available for testing or if you do not produce enough engines/equipment to meet the minimum rate for selecting test engines/equipment.
  4. (d)We may include other directions or information in the test order.
  5. (e)We may ask you to show us that you meet any additional requirements that apply to your engines/equipment (closed crankcases, for example).
  6. (f)In anticipation of a potential audit, you may give us a list of your preferred families and the corresponding assembly plants, storage facilities, or (if you import the engines/equipment) port facilities from which we should select engines/equipment for testing. The information would apply only for a single model year so it would be best to include this information in your application for certification. If you give us this list before we issue a test order, we will consider your recommendations, but we may select different engines/equipment.
  7. (g)If you also do routine production-line testing with the selected family in the same time period, the test order will tell you what changes you might need to make in your production-line testing schedule.