When creating an internal supplier for intercompany purposes do you have to assign them a Supplier T

When creating an internal supplier for intercompany purposes do you have to assign them a Supplier Type of Internal?

Our Supplier Types are defined by Federal Acquisition Regulations.  All purchases must be reported on a semi-annual basis to various agencies of the government as well as to the Small Business Administration by Supplier Type.  One of our Operating Units is already setup as a supplier and tied to a Supplier Type other than Internal.  Do I  need this field to say Internal or can I leave the value we already have setup?