; and (C) by redesignating paragraphs (6) and (7) as paragraphs (4) and (5), respectively. (b) Chief Data Officer responsibility for DoD data sets (1) In general In addition to any other functions and responsibilities specified in section 3520(c) of title 44, United States, Code, the Chief Data Officer of the Department of Defense shall also be the official in the Department of Defense with principal responsibility for providing for the availability of common, usable, Defense-wide data sets. (2) Access to all DoD data In order to carry out the responsibility specified in paragraph (1), the Chief Data Officer shall have access to all Department of Defense data, including data in connection with warfighting missions and back-office data. (3) Responsible to CIO The Chief Data Officer shall report directly to the Chief Information Officer of the Department of Defense in the performance of the responsibility specified in paragraph (1). (4) Report Not later than December 1, 2019, the Secretary of Defense shall submit to the Committees on Armed Services of the Senate and the House of Representatives a report setting forth such recommendations for legislative or administrative action as the Secretary considers appropriate to carry out this subsection. 904. Senior Military Advisor for Cyber Policy and Deputy Principal Cyber Advisor (a) Advisor (1) In general The Under Secretary of Defense for Policy shall, acting through the Joint Staff, designate an officer within the Office of the Under Secretary of Defense for Policy to serve within that Office as the Senior Military Advisor for Cyber Policy, and concurrently, as the Deputy Principal Cyber Advisor. (2) Officers eligible for designation The officer designated pursuant to this subsection shall be designated from among commissioned regular officers of the Armed Forces in a general or flag officer grade who are qualified for designation (3) Grade The officer designated pursuant to this subsection shall have the grade of major general or rear admiral while serving in that