According to 'SIS P3-IATA IS XML Invoice Standard-V3.1.1.,
there is this express 'Not Supported' in the 'SIS-Miscellaneous Catergory Billing' column, such as a CountryCode_ICAO.
What does this mean of 'Not Supported'.
In case of 'Not Supported', value for this CountryCode_ICAO
field don't need to be provided?
IS XML Invoice Standard -V3.1.1.
Line SIS-Miscellaneous Category Billings
CountryCode_ICAO 'Not Supported'