| Level 3 Code | Level 3 Description | Action |
|---|---|---|
| 12121100 | Professional and Scientific | Expand sub-codes |
| 12121102 | Administrative and Managerial | Expand sub-codes |
| 12121103 | Clerical and Related | Expand sub-codes |
| 12121105 | Service Workers | Expand sub-codes |
| 12121107 | Mining Metal Manufacture and Textiles | Expand sub-codes |
| 12121108 | Production Wood and Metalworkers | Expand sub-codes |
| 12121109 | Production Construction and Transport | Expand sub-codes |
| 12121110 | Lacking Occupation Code | Expand sub-codes |