((a)) Except as otherwise provided in this section, when approval is sought for a transaction under sections 11324 and 11325 of this title, the Board shall require the rail carrier to provide a fair arrangement at least as protective of the interests of employees who are affected by the transaction as the terms imposed under section 5(2)(f) of the Interstate Commerce Act before , and the terms established under section 24706(c)  of this title. Notwithstanding this part, the arrangement may be made by the rail carrier and the authorized representative of its employees. The arrangement and the order approving the transaction must require that the employees of the affected rail carrier will not be in a worse position related to their employment as a result of the transaction during the 4 years following the effective date of the final action of the Board (or if an employee was employed for a lesser period of time by the rail carrier before the action became effective, for that lesser period).

((b)) When approval is sought under sections 11324 and 11325 for a transaction involving one Class II and one or more Class III rail carriers, there shall be an arrangement as required under subsection (a) of this section, except that such arrangement shall be limited to one year of severance pay, which shall not exceed the amount of earnings from the railroad employment of that employee during the 12-month period immediately preceding the date on which the application for approval of such transaction is filed with the Board. The amount of such severance pay shall be reduced by the amount of earnings from railroad employment of that employee with the acquiring carrier during the 12-month period immediately following the effective date of the transaction. The parties may agree to terms other than as provided in this subsection.

((c)) When approval is sought under sections 11324 and 11325 for a transaction involving only Class III rail carriers, this section shall not apply.