The Department of Environmental Conservation amended N.Y. Comp. Codes R. & Regs. tit. 6, §§200, 201 and 231, pertaining to particulate matter. The change is an emergency rule to allow the department to comply with federal new source review rules from 2008 and 2010. http://www.dos.state.ny.us/info/register/2011/jun15/pdfs/rules.pdf pp. 14-21.