; (2) in paragraph (28), by striking the period at the end and inserting ; and ; and (3) by inserting after paragraph (28) the following: (29) of the commencement or continuation of a grievance, arbitration, or similar dispute resolution proceeding established by a collective bargaining agreement that was or could have been commenced against the debtor before the filing of a case under this title, or the payment or enforcement of an award or settlement under such proceeding. . 403. Effect on collective bargaining agreements under the Railway Labor Act Section 103 of title 11, United States Code, is amended by adding at the end the following: (m) Notwithstanding sections 365, 1113, or 1114, neither the court nor the trustee may change the wages, working conditions, or retirement benefits of an employee or a retiree of the debtor established by a collective bargaining agreement that is subject to the Railway Labor Act ( 45 U.S.C. 151 et seq.), except in accordance with section 6 of that Act ( 45 U.S.C. 156 ). .