EBU Single Rulebook Q&A 29 November 2013 2013_582 LE1 column 030 ('LEI code')

What does the legal entity identifier exactly mean? Does it mean LEI applicable in the reporting country? For example: currently in Poland in the national reporting system we use REGON code for Polish counterparties and EKZ code (Registration for Foreign Clients code) for foreign counterparties. We do not use the original Company Registration Number for foreign counterparties.