| Code | Type of change |
|---|---|
| 1 | Incorporation |
| 2 | Change of name |
| 2C | Correction of name |
| 23 | Change of name and type |
| 3 | Change of type |
| 3C | Correction of type |
| 5A | Complete annexation and part annexed of |
| 7 | Revision of Standard Geographical Classification (SGC) code |
| 7C | Correction of Standard Geographical Classification (SGC) code |
| Y | Common part |
| * | Denotes "part of" |