UT_EXERCICE - Defines available exercises and their corresponding periods
| Code | Type | Description |
| EXC_ID | Number | Identifier - Auto-generated |
| EXC_CD | String(50) | Code |
| EXC_DES | String(2000) | Description |
| EXC_VA_NAME | String(255) | Name |
| ORG_ID | Foreign Key | Link to Organisation. Mandatory |
| EXC_DT_FROM | Date | Exercice lower limit, included |
| EXC_DT_TO | Date | Exercice upper limit, excluded |