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