The Board is adopting this final rule to establish, for purposes of Title I of the Dodd-Frank Wall Street Reform and Consumer Protection Act (the "Dodd-Frank Act" or "Act"), the requirements for determining if a company is "predominantly engaged in financial activities"; and definitions of the terms "significant nonbank financial company" and "significant bank holding company." These terms are relevant to various provisions of Title I of the Dodd-Frank Act, including section 113, which authorizes the Financial Stability Oversight Council ("Council") to designate a nonbank financial company for supervision by the Board if the Council determines that the nonbank financial company could pose a threat to the financial stability of the United States.