text: The orchestra was a prominent aspect of the contest from 1956 to 1998. Pre-recorded backing tracks were first allowed for competing acts in 1973, but any pre-recorded instruments were required to be seen being "performed" on stage. In 1997, all instrumental music was allowed to be pre-recorded, although the host country was still required to provide an orchestra. In 1999, the rules were changed again, making the orchestra an optional requirement; the host broadcaster of , Israel's IBA, subsequently decided not to provide an orchestra, resulting in all entries using backing tracks for the first time. Currently all instrumental music for competing entries must now be pre-recorded, and no live instrumentation is allowed during performances.
  The main vocals of competing songs must be performed live during the contest. Previously live backing vocals were also required; since  these may optionally be pre-recordedthis change has been implemented in an effort to introduce flexibility following the cancellation of the 2020 edition and to facilitate modernisation.
  Running order
  Since , the order in which the competing countries perform has been determined by the contest's producers, and submitted to the EBU Executive Supervisor and Reference Group for approval before public announcement. This was changed from a random draw used in previous years in order to provide a better experience for television viewers and ensure all countries stand out by avoiding instances where songs of a similar style or tempo are performed in sequence.