Section 312IAC25-1-22. "Coal" defined  


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  •    "Coal" means combustible carbonaceous rock classified as bituminous or subbituminous by ASTM Standard D 388-77. (Natural Resources Commission; 312 IAC 25-1-22; filed Jun 21, 2001, 2:53 p.m.: 24 IR 3405, eff Dec 1, 2001; readopted filed May 29, 2007, 9:51 a.m.: 20070613-IR-312070146RFA; readopted filed Sep 19, 2013, 10:12 a.m.: 20131016-IR-312130125RFA)