"This policy memorandum (PM) and accompanying revisions to the Adjudicator’s Field Manual (AFM) guide U.S. Citizenship and Immigration Services (USCIS) officers on the distinction between and proper use of precedent and non-precedent Administrative Appeals Office (AAO) decisions. This PM revises Subchapter 14.4 of the AFM; AFM Update AD13-14. PM 602-0086 is hereby rescinded." - USCIS, Nov. 18, 2013.