Iran prepearing to change its regulations for aircraft acceptance, to ensure that new additions to airline fleets are no older than 2000 vintage.
The new rules will be introduced in a few days, according to the Iranian transportation ministry, which says that it will revise current regulations allowing purchase of aircraft dating back to 1995.
Its decision follows the loss of a Tupolev Tu-154 at Mashhad on 24 January. The Soviet-era jet was from the Russian Kolavia fleet, operating on behalf of Taban Air.
Iranian carriers have suffered other major accidents recently involving older types, including the loss of a Caspian Airlines Tu-154 and an Aria Air Ilyushin Il-62 in July last year.