| Name | Type | Description | Notes |
|---|---|---|---|
| start_date | date | The start date of the NI category (YYYY-MM-DD) | [optional] |
| ni_category | NICategoryLetter | ||
| ni_category_id | float | Xero unique identifier for the NI category | [optional] |
| date_first_employed_as_civilian | date | The date in which the employee was first employed as a civilian (YYYY-MM-DD) | [optional] |
| workplace_postcode | str | The workplace postcode |