To uniquely identify each animal within the group
| Position | Element | Name | Type | Min/Max | Repeat | |
|---|---|---|---|---|---|---|
| 1 | 127 | Reference Identification | Mandatory | Alphanumeric | 1/80 | 1 |
| 2 | 373 | Date | Mandatory | Date | 8/8 | 1 |
| 3 | 373 | Date | Mandatory | Date | 8/8 | 1 |
| 4 | 1313 | Test Period or Interval Value | Rel | Number | 1/6 | 1 |
| 5 | 344 | Unit of Time Period or Interval | Rel | ID | 2/2 | 1 |
| 6 | 127 | Reference Identification | Opt | Alphanumeric | 1/80 | 1 |
| 7 | 127 | Reference Identification | Opt | Alphanumeric | 1/80 | 1 |
| 8 | 373 | Date | Opt | Date | 8/8 | 1 |
| 9 | 127 | Reference Identification | Opt | Alphanumeric | 1/80 | 1 |