Neither the Secretary, nor any other actor, department, or agency of the Federal Government, shall condition the issuance of financial assistance under this part on a passenger air carrier’s or contractor’s implementation of measures to enter into negotiations with the certified bargaining representative of a craft or class of employees of the passenger air carrier or contractor under the Railway Labor Act (45 U.S.C. 151 et seq.) or the National Labor Relations Act (29 U.S.C. 151 et seq.), regarding pay or other terms and conditions of employment.