We have changed the geo codes to follow a pattern for each geo level, which is uniform across countries. The changes (before/after) are:

Overview of our geo code patterns for NUTS-analogous areas in Montenegro; counts are per the current Eurostat standard (for EFTA countries and candidate countries) and exclude the "extra-regio" and "not regionalized" codes.

References

• Statistical regions for EU candidate and EFTA countries
• National structures (non-EU)
• Montenegro (pdf)