(2) For the purposes of subsection (1) of this section, certified cost:
(a) May not exceed the incremental cost of labor and hardware that the Department of Environmental Quality finds necessary to perform a qualifying repower or retrofit;
(b) Does not include the cost of any portion of a replacement, repower or retrofit undertaken to comply with any applicable local, state or federal pollution or emissions law or for ordinary maintenance, repair or replacement of a diesel engine; and
(c) May not exceed the cost-effectiveness threshold. [2007 c.855 §7; 2007 c.855 §7a; 2017 c.742 §§3,4]