Qatar's government has proposed transferring the headquarters of ICAO to the Gulf state from 2016.
ICAO has had its permanent seat in Montreal, Canada, since 1946.
But it has disclosed that the Qatari state has presented an offer to serve at a new permanent seat, which ICAO is obliged to consider under assembly resolutions.
At least 60% of ICAO member states - of which there are 191 - must approve the Qatari proposal for it to be accepted.
No proposal to move the permanent seat can be considered unless all the ICAO contracting states are formally given at least 120 days' notice.
Members will look at the Qatari option at its triennial assembly which begins on 24 September 2013.
ICAO says it is still discussing, with Canadian officials, separate arrangements on a 20-year lease of its Montreal headquarters from December 2016.
Qatar is preparing to open a new hub airport at Doha but, owing to a regulatory hitch, a planned soft transfer at the beginning of April failed to take place. The new airport will be the base for Qatar Airways.