In carrying out its responsibilities, the HSPAC operates in a staff capacity. It does not substitute for line management or in any way exercise the prerogatives of the respective operating programs. Thus, the HSPAC advises the CPO, who in turn advises the Surgeon General. While HSPAC members are chosen from the respective USPHS OPDIVS, they neither represent OPDIV management nor speak for the OPDIV. They are knowledgeable professionals who represent a cross-section of the interests, concerns, and responsibilities of the professionals in agencies and organizations staffed by USPHS officers.