This excerpt taken from the GIS DEF 14A filed Aug 10, 2009.
Board Committees and Their Functions
The board has five standing committees that are each composed entirely of independent directors. The corporate governance committee reviews committee and committee chair assignments annually, and recommends committee rosters to the full board after considering factors such as the directors business and corporate governance experience, their preferences, criteria for specific committee service, the directors other responsibilities and scheduling flexibility. Assignments are rotated to ensure that each committee has an appropriate mix of tenure and experience. Committee membership shown below is effective as of August 1, 2009: