“ It is the policy of the Federal Government to ensure that each executive branch agency can perform its essential functions and remain an effectively functioning part of the Federal Government under all conditions. Accordingly, each agency shall take all appropriate actions to establish, maintain, and, as necessary, revise an order of succession, or to propose presidential action to establish or revise an order of succession. ”

“ Each agency for which presidential action is not required to establish an order of succession because of the agency’s existing legal authority shall establish and maintain such order in accordance with applicable law and any applicable guidance issued by the President or the Secretary of Homeland Security, including the laws and guidance regarding continuity plans and programs for the executive branch. ”