; and (2) not less frequently than every 3 years, update such training materials. (f) Independence (1) Prohibition with respect to former employees and board members A former employee or board member of the corporation or a national governing body shall not work or volunteer at the Center during the 2-year period beginning on the date on which the former employee or board member ceases employment with the corporation or national governing body. (2) Athletes serving on board of directors of national governing body (A) In general An athlete serving on the board of directors of a national governing body who is not otherwise employed by the national governing body, may volunteer at, or serve in an advisory capacity to, the Center. (B) Ineligibility for employment An athlete who has served on the board of directors of a national governing body shall not be eligible for employment at the Center during the 2-year period beginning on the date on which the athlete ceases to serve on such board of directors. (3) Conflicts of interest An executive or attorney for the Center shall be considered to have an inappropriate conflict of interest if the executive or attorney also represents the corporation or a national governing body. (4) Investigations (A) In general The corporation and the national governing bodies shall not interfere in, or attempt to influence the outcome of, an investigation. (B) Report In the case of an attempt to interfere in, or influence the outcome of, an investigation, not later than 72 hours after such attempt, the Center shall submit to the Committee on Commerce, Science, and Transportation of the Senate and the Committee on Energy and Commerce of the House of Representatives a report describing the attempt. (C) Work product (i) In general Any decision, report, memorandum, work product, notes, or case file of the Center— (I) shall be confidential