"To: Members of the staff".
"The present circular will be in effect until further notice; the circular complements ST/IC/2009/42, ST/IC/2012/7, ST/IC/2013/30 and ST/IC/2014/19".
"Annex: Diplomatic note dated 12 September 2017 from the United States Mission to the United Nations addressed to the Secretariat": p. 2.