The Air Pollution Control Board proposed to amend 326 Ind. Admin. Code §§1.2 & 4.1, concerning open burning with air curtain destructors. Changes would amend the definition of "air curtain destructor" to include portable self-contained units. The deadline for comment is July 1, 2011. http://www.in.gov/legislative/iac/20110601-IR-326110317FNA.xml.pdf.