, That this subsection shall not apply in a case in which a labor organization is the representative of the employees of the employer in accordance with section 9(a). . 6. Limitations (a) Labor organization rights This Act shall not prevent or affect the rights provided to labor organizations under section 9 of the National Labor Relations Act ( 29 U.S.C. 159 ). (b) Employee rights This Act shall not affect the rights and responsibilities of employees under the National Labor Relations Act ( 29 U.S.C. 151 et seq. ), except with respect to the amendments made to section 2(5) and section 8 of the National Labor Relations Act ( 29 U.S.C. 152(5)