Create a work assignment

Must be present when contractor_id is either empty or not set.

Must be present when employee_id is either empty or not set.

When true, the standard tax reductions are applied to this work assignment's Pay Stubs. Only one work assignment per Employee per Business Entity may be primary. If none is explicitly set to primary, the earliest work assignment is treated as primary.

An optional label for this work assignment, used to distinguish between multiple work assignments for the same Employee or Contractor.

The date the work assignment was archived. Archiving ends the work assignment's participation in future Payrolls. The archive date must not fall before any active Pay Rate's effective period.

The unique identifier of the object in Nmbr.

The type of the object in Nmbr ("work_assignment").