(a) In this section:
(1) “Agricultural product transportation” means the transportation of a raw agricultural product from the place of production using a heavy-duty truck to:
(A) a nonattainment area;
(B) an affected county;
(C) a destination inside the clean transportation zone; or
(D) a county adjacent to a county described by Paragraph (B) or that contains an area described by Paragraph (A) or (C).
(2) “Clean transportation zone” has the meaning assigned by § 393.001.

(b) Notwithstanding other eligibility requirements, the commission shall by rule or policy provide specific eligibility requirements under the Texas Clean Fleet Program established under Chapter 392 and under the Texas natural gas vehicle grant program established under Chapter 394, as added by Chapter 892 (Senate Bill No. 385), Acts of the 82nd Legislature, Regular Session, 2011, for projects relating to agricultural product transportation.
(c) The determining factor for eligibility for participation in a program established under Chapter 392 or 394 for a project relating to agricultural product transportation is the overall accumulative net reduction in emissions of oxides of nitrogen in a nonattainment area, an affected county, or the clean transportation zone.