Centralized Procurement with multiple requisitioning business units under one legal entity

We have certain requisitioning business units which helps business to segregate the business users/requesters in terms of requisitioning process. Whereas the procurement entity is centralized.

So in total there are 4 business units as follows-

BU A– Management Business Unit (Not below Legal entity) – Requisitioning Business Unit

BU B – Management Business Unit (Not below Legal entity) - – Requisitioning Business Unit

BU C – Management Business Unit (Not below Legal entity)- – Requisitioning Business Unit

BU D– Profit center Business Unit (Below a Legal entity)- Requisitioning and Procurement Business Unit.

The Inventory Organization (IO A) / Central warehouse is under BU D which is a procurement business unit.