StacksVerified U.S. regulatory reference

40 CFR §610.20

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The Administrator will employ the following criteria for evaluating the accuracy of fuel economy representations made with respect to retrofit devices:
  1. (a)Device functional category;
  2. (b)Device integrity;
  3. (c)Operator interaction effects;
  4. (d)Validity of test data;
  5. (e)Evaluation of test data;