Requisition DFF make mandatory based on previous attribute selected value

Summary:

We need to make mandatory one of DFF attribute based on previous attribute selection.

If user select Sub Business Unit "Abc" or "XYZ" then Contract field is mandatory.

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Anyone did this type of personalization on requisition page level?

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):