FSO-REG-NUM / JE – REG NUMBER / JA – REG NUMBER / JL – REG NUMBER and AR-SYSTEM-PARAM-REG-NUM for party tax profiles

When adding tax reporting codes to a party tax profile, there are the following options
 FSO-REG-NUM / JE – REG NUMBER / JA – REG NUMBER / JL – REG NUMBER and AR-SYSTEM-PARAM-REG-NUM

but all of these are only used in migrated data.

Member State however is used in the  Intra EU Audit Trail