The NYSE also said board members from securities industry firms are prohibited from serving on the compensation committee, bowing to the opinion that the influence of high-paid financial executives may have contributed to the as-of-yet unrevealed lofty pay of NYSE executives.

FORBES: Self-Regulation Hits The NYSE

In a letter to parliament's Culture, Media and Sport committee last month, James Murdoch said he could have asked more questions of senior officers at the firm, but rejected the suggestion that his resignation as chief executive reflected unrevealed knowledge relating to the scandal.

CNN: James Murdoch resigns as BSkyB chairman