Darfur Accountability and Divestment Act of 2006

Darfur Accountability and Divestment Act of 2006 - Supports state, city, and university efforts to divest funds from, or restrict investments in, companies that conduct business operations in Sudan.

Directs: (1) the Securities and Exchange Commission (SEC) to require all companies trading in registered securities that conduct business operations directly or through parent or subsidiary companies in Sudan to disclose the nature of such operations; and (2) the Government Accountability Office (GAO) to investigate the existence and extent of such companies' Federal Retirement Thrift Investment Board investments.

Prohibits U.S. government contracts with such companies, with exceptions for companies whose activities are related to: (1) southern Sudan, southern Kordofan/Nuba Mountains State, Blue Nile State, or Abyei; (2) the implementation of the 2006 Darfur Peace Agreement; (3) the provision of military equipment for nongovernmental organizations in the Darfur region of Sudan, the African Union Mission in Sudan (AMIS), or the United Nations; or (4) the provision of humanitarian assistance that is of immediate and substantial benefit to the majority of people of the Darfur region of Sudan or the majority of people of eastern Sudan, including the Red Sea, Kassala, and Gedaref States.

Authorizes a national security waiver of such prohibition on a case-by-case basis.