Can you use of Intra/Interunit for procurement and vouchers?

Can InterUnit and IntraUnit billing be used simultaneously?  InterUnit is defined as "Any transactions involving two or more General Ledger business units within the same ledger group. These can be either InterEntity or IntraEntity, depending on how the business units are defined and how they are mapped in the legal entity hierarchy". IntraUnit is defined as "A transaction within a single General Ledger business unit that involves more than one value in a lower level Balancing ChartField, such as a Fund or Department. The generic description of intraunit can be substituted with more specific terms, such as inter operating unit,