Which of the following is NOT a feature of the Incident Command System?

The Incident Command System (ICS) is designed to provide a standardized approach to managing emergencies and incidents, allowing for effective coordination among various agencies and resources. A key feature of ICS is its clear hierarchical structure, which defines roles and responsibilities to ensure accountability and smooth operation during an incident response.

Additionally, ICS emphasizes standardized communication protocols to facilitate effective information sharing among different teams and organizations involved, which reduces confusion and enhances coordination. The flexible response capability of ICS allows it to adapt to various incident types and scales, making it highly functional in diverse situations.

While ICS does utilize specific terminology (like "Incident Commander" or "Operational Period") to enhance clarity among trained personnel, it does not rely on a specialized code that serves to exclude or confuse others. Instead, the aim is to maintain simplicity and universality so that anyone within the system can understand and use the terminology effectively, thus ensuring that the system remains accessible to a wide range of personnel, including those from different agencies or backgrounds. Therefore, the aspect of specialized code and terminology does not align with the core principles of the ICS, making it the correct choice for what is NOT a feature of the system.