Code of Federal Regulations Title 10. Energy § 10.490.500 Purpose and scope

(a) Acquire alternative fueled vehicles in excess of the number they are required to acquire under this part or obtain alternative fueled vehicles before the model year when they are required to do so under this part;

(b) Acquire certain other vehicles as identified in this subpart;  or

(c) Invest in qualified alternative fuel infrastructure or non-road equipment or an emerging technology.