Sulfur-free generation
Sulfur-free generation means the generation of electricity by a process that does not have any emissions of sulfur dioxide, including hydroelectric, nuclear, solar, or wind generation. A sulfur-free generator is a generator that is located in one of the 48 contiguous States or the District of Columbia and produces sulfur-free generation.
Source
40 CFR § 72.2
Scoping language
The terms used in this part, in parts 73, 74, 75, 76, 77 and 78 of this chapter shall have the meanings set forth in the Act, including sections 302 and 402 of the Act, and in this section as follows: