Yes they can. Set it to ID 1, which APX CPS gives you for free.
So--- I change a hard coded read only field to 1 then program ok? I'd love to know how to do that with the regular software....
See attached picture (one to verify flash code and show it has the ASK Enable option)
I currently have ASK Required unchecked so I can reprogram conventional stuff without digging out or using an advanced key. Especially since my Surface Pro tablet only has USB-C ports makes life a lot easier without having to drag out a lot of adapter cables or hubs etc..........
Regardless of whether ASK Required is checkmarked... the Owner Advanced Key type is grayed out (unselectable) along with the Owner System ID (also grayed out and unselectable)
If that can be changed... let me know. I'd love to know how.
Deleting the trunked system for the owner system and dropping in a generic system of SYSID=1 won't do it.
That software based ASK that shows on the System Key Report won't let you write to the radio if no physical hard key ASK is connected --AND-- the check mark is in ASK Required field in the codeplug.