Section 1611.6 - Testimony of former CSB employees(a) It is not necessary to request CSB approval for testimony of a former CSB employee, nor is such testimony limited to depositions. However, the scope of permissible testimony continues to be constrained by all the limitations set forth in § 1611.3 and § 1611.4 .(b) Any former employee who is served with a subpoena to appear and testify in connection with civil litigation that relates to his or her work with the CSB, shall immediately notify the CSB General Counsel and provide all information requested by the General Counsel. 66 FR 17366 , Mar. 30, 2001, as amended at 66 FR 23854 , May 10, 2001