The United Arab Emirates dirham was introduced 19 May 1973. It replaced the Qatar and Dubai riyal at par. The Qatar and Dubai riyal had circulated since 1966 in all of the emirates except Abu Dhabi, where the dirham replaced the Bahraini dinar at 1 dirham = 0.1 dinar.he United Arab Emirates Central Bank has released a new 50 dirham note. The security thread is a 3-mm wide, color-shifting windowed security thread with demetalized UAE 50, and it bears the new coat of arms which was adopted on 22 March 2008.