Independent National Security Classification Board Act of 2004

Independent National Security Classification Board Act of 2004 - Establishes the Independent National Security Classification Board as an independent agency within the executive branch.

Directs the Board, with respect to national security information, to: (1) review the classification system for such information and recommend reforms to ensure the protection of national security, information sharing among Government agencies, and an open and informed public discussion; (2) prescribe the classification system for such information applicable to all departments and agencies of the United States; and (3) upon its own initiative or by request of the Inspector General of an executive agency or the chairman or ranking member of specified congressional committees, review any classification decision made by an executive agency with respect to such information.

Authorizes the Board to: (1) conduct hearings; (2) secure information from any Federal agency; (3) obtain administrative support services; (4) use the U.S. Postal Service in the same manner as other Federal agencies; and (5) accept, use, and dispose of gifts or donations of services or property.