; (5) develop financial management policy for the Department and oversee the implementation of such policy, including the establishment of effective internal controls over financial reporting systems and processes throughout the Department; (6) provide guidance for and over financial system modernization efforts throughout the Department; (7) lead the efforts of the Department related to financial oversight, including identifying ways to streamline and standardize business processes; (8) oversee the costs of acquisition programs and related activities to ensure that actual and planned costs are in accordance with budget estimates and are affordable, or can be adequately funded, over the lifecycle of such programs and activities; (9) implement fully by fiscal year 2022 a common accounting structure to be used across the entire Department; (10) track, approve, oversee, and make public information on expenditures by components of the Department for conferences, as appropriate, including by requiring each component to— (A) report to the Inspector General of the Department, the Committee on Homeland Security of the House of Representatives, and the Committee on Homeland Security and Governmental Affairs of the Senate the expenditures by such component for each conference hosted or attended by Department employees for which the total expenditures of the Department exceed $20,000, within 15 days after the date of the conference; and (B) with respect to such expenditures, provide— (i) the information described in subsections (a), (b), and (c) of section 739 of title VII of division E of the Consolidated and Further Continuing Appropriations Act, 2015 ( Public Law 113–235 ); and (ii) documentation of such expenditures