My AI policy is as follows:

"You are allowed to use AI in any take-home assignments unless stated otherwise. However, you may not copy directly from AI output, and you are responsible for understanding anything that you turn in. If I suspect you of submitting AI-generated work without having understood the material, I reserve the right to test your understanding via oral assessment. If you are unable to demonstrate a level of understanding which is consistent with your submitted work, you may be asked to re-do the assignment or you may receive a grade penalty."