| Code | Explanation | From | Through |
|---|---|---|---|
| 00 | NOT APPLICABLE | 01/01/1980 | Present |
| AA | GRADE AA | 01/01/1980 | Present |
| BB | GRADE BB | 01/01/1980 | Present |
| CA | CAREER AMBASSADOR | 01/01/1980 | Present |
| CC | GRADE CC | 01/01/1980 | Present |
| CM | CAREER MINISTER | 01/01/1980 | Present |
| DD | GRADE DD | 01/01/1980 | Present |
| EE | GRADE EE | 01/01/1980 | Present |
| MC | MINISTER COUNSELOR | 01/01/1980 | Present |
| NC | NONCAREER | 01/01/1980 | Present |
| OC | COUNSELOR | 01/01/1980 | Present |
| SL | SENIOR LEVEL | 01/01/1980 | Present |