IDR Assign Business Unit to Invoice Using Routing Attribute - BPM Business Rule

Summary:

Content (please ensure you mask any confidential information): In our current consideration stages of adopting IDR, we would like to forgo having to assign the business unit ID in the email subject line and instead have Routing Attribute 2 act as the identifier on what BU should be assigned to the Invoice Header. Utilizing IDR's Sender or Recipient address mappings to BU will not meet our requirements.

Is it possible to build a BPM Business Rule so that the value in Routing Attribute 2 will route to a certain BU?

I'm assuming FinApIncompleteInvoiceHold is the task I'd want to build this in and would be something along the lines of the following: