Treasury Secretary Scott Bessent stated that foreign companies providing fuel, landing services, or ticket sales to Iranian carriers will be knocked out of the dollar system. This enforcement begins September 23, following the US Treasury's decision to pull licenses allowing foreign airlines to fly Iranian aircraft on September 8, which triggered a 15 day wind down period.

Any airline or service provider continuing business with Iranian carriers after the deadline faces US sanctions. This move blocks Iranian aviation from international operations by threatening the financial access of third party partners globally.