Three officials received international Para-taekwondo referee certificates after attending a seminar in Sweden.
Shahram Arbabi, Ali Bavaghar and Seyedeh Marjan Taheri, from Iran, attended last September's third World Taekwondo Para-international kyorugi referee seminar in Malmö.
The three Iranian referees passed theoretical and practical tests and were awarded international kyorugi Para-taekwondo referee certificates.
Arbabi has also been invited to judge in the eighth World Taekwondo Championships from May 15 to May 19 in Manchester.
The Islamic Republic of Iran Taekwondo Federation has also recently appointed Vahid Abdollahi to its senior coaching set up in preparation for that competition.
Abdollahi had success leading the junior Iranian men's team, who won seven gold medals and two bronze at last year's World Junior Championships.