My guess is the L-159 does not require U.S. approval under ITAR.
The L-159 can carry Aim-9s and Aim-120s. However, the Aim-120s would probably need to go through a certification process.
The L-159 can carry:
CBU-87 Combined Effects Munition
Mark 82 general-purpose bombs
Mark 83 general-purpose bombs
GBU-12 Paveway II
GBU-16 Paveway II
AGM-65 Maverick
I hope the rumor is true.
From Wikipedia:
“On 11 May 2023, Czech President Petr Pavel, in a radio interview, offered the Areo L-159 to Ukraine. Subject to a decision by the Czech government, President Pavel said “It is worth considering whether we could provide Ukraine with our L-159 aircraft. As direct combat support aircraft, (the planes) could also help Ukraine significantly in the counteroffensive”… It is also an upgrade from the Aero L-39 Albatros that the Ukraine Air Force uses.”
They could deliver 500lb and 1,000 pound bombs, including laser-guided bombs that hit within a yard of their target, and others that can home in on GPS jammers, to open the door for GPS guided weapons.
I think that Czechia has about 24 of these aircraft active.