TNRCC Outdated 30 and 31 TAC 117
Listed by Effective DateThe TNRCC is providing the outdated 30 TAC 117 and 31 TAC 117 (Control of Air Pollution from Nitrogen Compounds). The official rules (31 TAC 117) date from 1972 and the rule changed to 30 TAC 117 in September 1993. Below is each rule change that states what changed in each version of the rule. A history showing all 30 TAC 117 and 31 TAC 117 changes is available. The agency has tried to make a complete version of each old rule available, but in some cases the old rule was not available.
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