Executive Order 13736: Providing an Order of Succession Within the Department of Veterans Affairs [open pdf - 189KB]
"By the authority vested in me as President by the Constitution and the laws of the United States of America, including the Federal Vacancies Reform Act of 1998, as amended, 5 U.S.C. 3345 et seq. (the 'Act'), it is hereby ordered that: Section 1. Order of Succession. Subject to the provisions of section 2 of this order and to the limitations set forth in the Act, the following officials of the Department of Veterans Affairs, in the order listed, shall act as Secretary of Veterans Affairs (Secretary) and perform the functions and duties of the office of the Secretary during any period in which both the Secretary and the Deputy Secretary of Veterans Affairs have died, resigned, or otherwise become unable to perform the functions and duties of the office of Secretary: […]"
Executive Order 13736; EO 13736
Federal Register: http://www.gpo.gov/fdsys/browse/collection.action?collectionCode=FR
Federal Register (August 17, 2016), v.81 no.159, p.54711