The Public Information Officer:
a. Interfaces with the public and media and/or with other agencies regarding incident-related information requirements.
B. Controls messaging and limits the independence of other organizations participating in the incident.
C. Serves as a press secretary for the Agency Executive or Senior Official during the incident.
D. Directs the Joint Information Center operation with the Emergency Operations Center
Generally speaking, the Public Information Officer "Serves as a press secretary for the Agency Executive or Senior Official during the incident," since these people act as "middle men" between the agency and the public.