[Code of Federal Regulations] [Title 20, Volume 3] [Revised as of April 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 20CFR501.12] [Page 9] TITLE 20--EMPLOYEES' BENEFITS CHAPTER IV--EMPLOYEES' COMPENSATION APPEALS BOARD, DEPARTMENT OF LABOR PART 501--RULES OF PROCEDURE--Table of Contents Sec. 501.12 Intervention. The Board may permit any person whose rights may be affected by any proceeding before the Board to intervene therein whenever such person shows in a written petition to intervene that such rights are so affected. The petition should state with precision and particularity (a) the rights affected; and (b) the nature of any argument he intends to make.