Cost center GL hierarchy based approval in PO and Requisition

Summary:

Hi,

We have the requirement to route the requisition and purchase order approvals to set of users based on cost centers and amount ranges. Set of approvers are different for each cost center and amount ranges. Client has 1700 cost centers which rolls up to 70 departments which in turn rolls up to 20 divisions.

We have created user defined attribute at cost center GL hierarchy parent which is at department/division and rules are written accordingly. This works. We would like to clarify the following queries:

1. Would like to check how does the below attribute would work if cost center hierarchies are more than one and how the parents need to be referenced in the below rule?