Many of America’s leading companies have policies in place that prevent their executives from serving on external boards. These policies are one of the many obstacles of achieving board diversity and can complicate efforts that seek to advance women and diverse candidates into the boardrooms in corporate America. In a conversation with champions of change, we’ll examine the status of certain company policies, where leaders may need to evolve, and how supporting women and executives who are invited to join boards can be good for all stakeholders.