Can get WorkerAssignment.Bargaining Unit in Rule Conditions for Change Personal Information Approval

Summary:

Is there any way to get Worker's Assignment.Bargaining Unit in Rule Conditions for Change Personal Information Approval Process?

Content (required):

We can find Worker's Assignment.result.Bargaining Unit in Change Assignment, Promote Approval process..etc. 

But in the Change Personal Information Approval process, we can't find Bargaining Unit attribute in Worker's Assignment.

Thanks

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