[zaxomi]

Coordinating Committee for Multilateral Export Controls (COCOM) limits is 1,000 knots (510 m/s) and/or at an altitude higher than 18,000 m (59,000 feet).

Commercial airliners usually have a service ceiling at about 40000 feet and a speed below the speed of sound (343 m/s). Even with a very strong jet stream of 100 m/s it's below the limit.

The Concorde had a service ceiling of 60000 feet and maximum speed of 605 m/s.

[dharmab]

COCOM is technically AND, so you can buy some receivers which will work with one or the other condition.