(a)
In general— Subject to subsection (b), not later than 90 days after the date of enactment of this Act, and every 5 years thereafter, the Administrator of the Environmental Protection Agency (in this section referred to as the “Administrator”) shall update the methodology used by the Environmental Protection Agency in lifecycle analyses with respect to—
(1)
greenhouse gas emissions that result from ethanol derived from corn starch; and
(2)
greenhouse gas emissions that result from biomass-based diesel (as defined in section 211(o)(1)(D) of the Clean Air Act (
42 U.S.C. 7545(o)(1)(D)).
(b)
Requirements—
(1)
First update— In carrying out the first update required under subsection (a), the Administrator shall adopt the most recent Greenhouse Gases, Regulated Emissions, and Energy Use in Transportation model (commonly referred to as the “GREET model”) developed by Argonne National Laboratory.
(2)
Subsequent updates— In carrying out the second and each subsequent update required under subsection (a), the Administrator shall—
(A)
as necessary, adopt, review, or update a methodology determined to be appropriate by the Administrator; or
(B)
adopt the methodology described in paragraph (1).