In 1996 the United States Conference of Catholic Bishops invited the Newman Society to advise on guidelines to implement "Ex corde Ecclesiae". The bishops approved final guidelines in 1999, consistent with the recommendations of the Newman Society. In 2006, the Bishops' and Presidents' Committee of the USCCB sent a letter to the ten bishops listed as "ecclesiastical advisers" to the Cardinal Newman Society, calling the organization "often aggressive, inaccurate, or lacking in balance" and its methods "often objectionable in tone and substance." It suggested that the bishops resign from the advisory board. The board was subsequently disbanded.