40 CFR 60.2550 - What CISWI units must I address in my state plan?
(a) Your state plan must address incineration units that meet all three criteria described in paragraphs (a)(1) through (3) of this section:
(1) CISWI units and air curtain incinerators in your state that commenced construction on or before June 4, 2010, or commenced modification or reconstruction after June 4, 2010 but no later than August 7, 2013;
(3) Incineration units not exempt under § 60.2555.
(b) If the owner or operator of a CISWI unit or air curtain incinerator makes changes that meet the definition of modification or reconstruction after August 7, 2013, the CISWI unit becomes subject to subpart CCCC of this part and the state plan no longer applies to that unit.
(c) If the owner or operator of a CISWI unit makes physical or operational changes to an existing CISWI unit primarily to comply with your state plan, subpart CCCC of this part does not apply to that unit. Such changes do not qualify as modifications or reconstructions under subpart CCCC of this part.