Position Name Validation using VBCS

We need to validate the position name that it should be Job Name-Location-Department-Union name on the redwood page using VBCS. We have raised an Autocomplete use case which was approved for customer International Paper Company (Use Case ID#1), however I am not sure if we need to use VBCS business validation rule or autocomplete? Also requesting your guidance on how to build such rule using VBCS.