Final answer:
Joint Information Centers (JICs) are managed by government agencies and emergency management organizations to provide structured and efficient public communications during emergencies.
Step-by-step explanation:
The entities responsible for establishing and overseeing Joint Information Centers (JICs) as well as implementing processes for coordinating and clearing public communications are government agencies and emergency management organizations. JICs are designed to provide a structured, integrated, and efficient means of disseminating information to the public and media during emergencies or significant events. By doing so, they ensure that the public receives accurate, timely, and coordinated messages from multiple agencies, which is vital in crisis situations.