National Security Presidential Memorandum - 2: Organization of the National Security Council and the Homeland Security Council, January 28, 2017 [open pdf - 180KB]
"This document is part of a series of National Security Presidential Memoranda that shall replace both Presidential Policy Directives and Presidential Study Directives as the instrument for communicating relevant Presidential decisions. This memorandum shall supersede all other existing Presidential guidance on the organization or support of the NSC [National Security Council] and the HSC [Homeland Security Council]. With regard to its application to economic matters, this document shall be interpreted in concert with any Executive Order governing the National Economic Council and with Presidential Memoranda signed hereafter that implement either this memorandum or that Executive Order."
Federal Register (February 2, 2017), v.82 no. 21 p. 9119-9123
Government Publishing Office: http://www.gpo.gov/