Sec. 4. As used in this chapter, "coal gasification facility" means a facility in Indiana that uses a manufacturing process that converts coal into a clean gas that can be used: (1) as a fuel to generate energy; or (2) as substitute natural gas. As added by P.L.159-2002, SEC.6. Amended by P.L.175-2007, SEC.14; P.L.150-2011, SEC.4.