How can we have blank Business Unit that can act as a Procurement shared service centre BU?

Summary:

Oracle Document "Shared Service Centers Drive for Quality, Productivity Gains, and Cost Control" (January 31, 2023 7 Helle Hennings / Senior Product Strategy Director) state "in Figure 3 the global procurement business unit is standalone. It has not been assigned any other business functions and has not been linked to a primary ledger". Does this means a

SSC BU can convert requisitions to PO without having enabled any Business Functions? Is this possible in the application?

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