Thanks very much guys for stopping by to answer a newbie with a question, I appreciate it.
I understand it very unlikely that sort of aircraft would be operated VFR, I was in particular curious if there was a rule stating the aircraft is restricted from operating by such means. And, after your answers, it would appear not as I suspected. I guess I was thinking perhaps the engineering staff of a particular airline might conduct a service on the aircraft, and then complete a few VFR circuits of the airfield to test their work was a particular example that came to mind. Or perhaps an airline showing off their new aircraft with a few low level circuits of their hub city, that sort of example. Obviously with passengers for scheduled flights IFR is ideal and always used, but just curious to see if VFR wasn't banned completely, when special circumstances might require otherwise
Thanks again.