Hi Regina,

I have posted something similar on below links i.e. second ui reference should be dependent on first ui reference. Not sure on the script include part you are asking.

I achieved it without using script include.

How to make assigned_to field dependent on assignment group on a UI page

Change ui reference query

Reference field dependency on UI Page

Mark Correct if this solves your issue and also hit Like and Helpful if you find my response worthy based on the impact.

Thanks

Ankur