The International Cricket Council announced the officials for the 2007 ICC World Twenty20 on 26 July 2007.
Three South African officials in Brian Jerling, Karl Hurter and Marais Erasmus will serve as fourth umpires for all matches in the group stage.
The suspended officials are umpires Steve Bucknor, Aleem Dar, Rudi Koertzen and Billy Bowden, along with referee Jeff Crowe, all of whom are members of the ICC's elite panels.
The fast-paced, exciting nature of Twenty20 cricket has led to some umpires in domestic Twenty20 competitions using much more flamboyant signals than they would otherwise use.
The ICC has, however, issued special instructions to the umpires, telling them to remain calm and to officiate in their normal manner, so as not to distract spectators from the cricket and to ensure that they are concentrating fully on any decisions they may be asked to make.