(a) A supplier that has one or more registered locations and maintains a central processing computer system in which orders are stored may have one or more of the supplier's registered locations fill an electronic order if the supplier does the following:

1. (1) Assigns each item on the order to a specific registered location for filling.
2. (2) Creates a record linked to the central file noting both which items a location filled and the location identity.
3. (3) Ensures that no item is filled by more than one location.
4. (4) Maintains the original order with all linked records on the central computer system.