Previously published (Geneva, 1956 and 1958; New Delhi, 1960; Geneva, 1964; Mar del Plata, 1968; Geneva, 1972, 1976 and 1980, Malaga-Torremolinos, 1984; Melbourne, 1988; Helsinki, 1993; Geneva, 1996; Montreal, 2000; Florianópolis, 2004; Johannesburg, 2008; Dubai, 2012).
This Hammamet, 2016 edition was initially published in 2016 and then republished in November 2017 to move the contents of Annex A (ITU-T Documentation) to Section 1bis, as approved during the Assembly.