To identify additional charges that may or may not be directly related to a line item.
For a line item: freight or special charge; for the total invoice: the total charges -- expressed in the standard monetary denomination for the currency specified.
Code identifying type of special charge.
If ACS02 = 999 (indicating other), then ACS03 is required to identify the charge.
A free-form description to clarify the related data elements and their content.
