Can Related Value Sets and Cross Validation Rules co-exist?

Summary:

We have Related Value sets between 2 segments. E.g. A list of BUs will only be visible upon selection of a Legal Entity
IF we select from UI, this works fine, but when we use integration and mention the whole, the system does allow any combination of BU and LE to exist.

We need cross validation rules now to restrict those BU and LE combinations to be created.

However, we cannot create Cross Validation rules for the BU and LE. Since the Condition Filter allows LE but the Validation Filter does not give any BU Values for selection.

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