Answer:
If an incident is too large or too complex and it exceeds the span of control of one single Incident Commander, the ICS may appoint staff positions, called Section Chiefs to help the Incident Commander oversee different components of the operation. These staff positions include doers (operational staff), thinkers (planning staff), getters (logistics staff) and payers (financial staff).
Explanation:
One of the main principles of the ICS is to limit the span of control of individuals. For example, usually when a supervisor has more than seven people under his/her control, or directly reporting to him/her, the supervisor needs to divide tasks with another supervisor or another person to lower responsibility and span of control.