PAF should immediately look to working with TAI to use the Turkish code for its F-16's.
No, the agreement contract between Turkey and US, they don't tell anyone including Pakistan. It is commitment terms. It is good reason Turkey is NATO member and accept US radar in its soils.
Turkey will become the first nation among 26 to have the F-16s in their inventories and have the ability to receive information on the F-16 fighters’ software source codes
Good to become first nation. Interesting quotes below.
Access to the F-35’s software source code remains a live issue for the Israelis, as it has been with the Australians [PDF], British, and others. That access is necessary for countries that want to upgrade the aircraft’s computers, and/or integrate new weapons, communications, or electronic warfare systems. Israeli planes generally undergo heavy modifications to incorporate Israeli electronics and weapons systems, and the US has allowed the Israelis access to the F-15 and F-16’s software. In June 2006, Snir said that he is confident the F-35A’s computers will not be an issue. He reiterated that there was:
”...no dispute with the US that IAF F-35s would include Israeli communications and electronic warfare technologies and missiles developed by Rafael Armament Development Authority Ltd.”
The U.S. will not grant Israel the source code to alter threat and jamming libraries, and so Israel must rely on an arrangement by which the U.S. will “make the required software changes to meet any new threat that might emerge in the region.” If they’re willing. When they get around to it.
US is not stupid giving free source codes to Turkey, they know Turkey has good friend of Pakistan. The agreement is clear signed by both countries.
If Pakistan access the source codes without permissions, US will be alert in active monitor systems. The blame goes to Turkey.