40 CFR § 600.509-12
Voluntary submission of additional data
June 9, 2020
(a) The manufacturer may optionally submit data in addition to the data required by the Administrator.
(b) Additional fuel economy and carbon-related exhaust emissions data may be submitted by the manufacturer for any vehicle configuration which is to be tested as required in §600.507 or for which fuel economy and carbon-related exhaust emissions data were previously submitted under paragraph (c) of this section.
(c) Within a base level, additional fuel economy and carbon-related exhaust emissions data may be submitted by the manufacturer for any vehicle configuration which is not required to be tested by §600.507.
[75 FR 25713, May 7, 2010]
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