61 STAT.] 80TH CONG. , 1ST SESS.-CH. 120 --JUNE 23, 1947 compelled, after having claimed his privilege against self-incrimina- tion, to testify or produce evidence, except that such individual so tes- tifying shall not be exempt from prosecution and punishment for perjury committed in so testifying. " (4) Complaints, orders, and other process and papers of the Board, its member, agent, or agency, may be served either personally or by registered mail or by telegraph or by leaving a copy thereof at the principal office or place of business of the person required to be served. The verified return by the individual so serving the same setting forth the manner of such service shall be proof of the same, and the return post office receipt or telegraph receipt therefor when registered and mailed or telegraphed as aforesaid shall be proof of service of the same. Witnesses summoned before the Board, its member, agent, or agency, shall be paid the same fees and mileage that are paid witnesses in the courts of the United States, and witnesses whose depositions are taken and the persons taking the same shall severally be entitled to the same fees as are paid for like services in the courts of the United States. "(5) All process of any court to which application may be made under this Act may be served in the judicial district wherein the defendant or other person required to be served resides or may be found. "(6) The several departments and agencies of the Government. when directed by the President, shall furnish the Board, upon its request, all records, papers, and information in their possession relating to any matter before the Board. "SEC. 12. Any person who shall willfully resist, prevent, impede, or interfere with any member of the Board or any of its agents or agencies in the performance of duties pursuant to this Act shall be punished by a fine of not more than $5,000 or by imprisonment for not more than one year, or both. ' "L IM IT ATIONS "SEC. 13. Nothing in this Act, except as specifically provided for herein, shall be construed so as either to interfere with or impede or diminish in any way the right to strike, or to affect the limitations or qualifications on that right. "SEC. 14 . (a) Nothing herein shall prohibit any individual em- ployed as a supervisor from becoming or remaining a member of a labor organization, but no employer subject to this Act shall be com- pelled to deem individuals defined herein as supervisors as employees for the purpose of any law, either national or local, relating to collec- tive bargaining. "(b) Nothing in this Act shall be construed as authorizing the execution or application of agreements requiring membership in a labor organization as a condition of employment in any State or Terri- tory in which such execution or application is prohibited by State or Territorial law. "SEC. 15. Wherever the application of the provisions of section 272 of chapter 10 of the Act entitled 'An Act to establish a uniform system of bankruptcy throughout the United States', approved July 1. 1898, and Acts amendatory thereof and supplementary thereto (U. S . C ., title 11, sec. 672), conflicts with the application of the provisions of this Act, this Act shall prevail: Provided, That in any situation where the provisions of this Act cannot be validly enforced, the pro- visions of such other Acts shall remain in full force and effect. "SEc. 16. If any provision of this Act, or the application of such provision to any person or circumstances, shall be held invalid, the remainder of this Act, or the application of such provision to persons or circumstances other than those as to which it is held invalid, shall not be affected thereby. 151 Service of com- plaints, orders, etc. Payment of wit- nesses. Records of depart- ments, etc. Penalty. Right to strike. Supervisors. Execution of agree- ments requiring mem- bership, etc. Conflict with other laws. 62 Stat. 904. Separability of pro- visions.