Which ICS form provides an organization assignment list?

The correct choice is the ICS 203 form, which is specifically designed to provide an organizational assignment list. This form includes information about the resources assigned for each operational period, detailing the specific roles and responsibilities of personnel within the incident command structure.

In a typical incident, clarity in personnel assignments is crucial for effective communication and operational efficiency. The ICS 203 serves this purpose by outlining the organizational hierarchy and ensuring that everyone involved understands their specific tasks and who they report to. This structure helps to streamline operations during an incident, allowing for a more coordinated response.

The other options pertain to different facets of incident management. While ICS 201 is the Initial Incident Command (IC) Objectives form and ICS 202 provides information for the Incident Action Plan by summarizing the objectives, strategies, and important information, ICS 204 focuses on the assignment list for the operational period. Each of these forms plays a unique role in the incident command system, but the ICS 203 is specifically focused on organizational assignments, making it the correct answer for this question.