The qualifying clock will be reset to zero if the agency worker stops working for one hirer and begins working for another.
Generally, such situations will be clear. A new hirer for this purpose must be a different person (a different legal entity). Where a single hirer has multiple sites, merely moving the worker from one site to another will not usually break continuity (unless it is a substantively different role – see section on factors which indicate role is substantively different).
However, hirers and TWAs should be aware of the anti-avoidance provisions which prevent a series of assignments from being structured in such a way as to prevent the worker from completing the qualifying period. These provisions would cover, for example, the situation where an agency worker is moved back and forth across a group where there is common ownership via holding companies and subsidiaries and the intention is to deprive the agency worker from receiving equal treatment.
If there is a substantive change to a job role within the same hirer, a new qualifying clock commences for the new role.