1. Short title This Act may be cited as the Commonsense Legislative Exceptional Events Reforms Act of 2017 . 2. Clean Air Act exceptional events Section 319(b) of the Clean Air Act ( 42 U.S.C. 7619(b) ) is amended— (1) in paragraph (1)(B)— (A) in clause (i), by inserting or after the semicolon; (B) by striking clause (ii); and (C) by redesignating clause (iii) as clause (ii); and (2) in paragraph (3)— (A) in subparagraph (B)(iv), by striking to petition the Administrator to and inserting to submit a petition (in this section referred to as an exceptional event demonstration ) to the Administrator to