So I was watching Jurassic World 2 (it was rubbish) but I was just wondering how Studio C would have been set up to be used in a brief clip for the movie. Would the cameras be the usual or would the film company use their own? And if they are the usual cameras, how do they change the aspect ratio? And whatever happened to making the ticker and astons different enough that you can spot it's not a real broadcast. (think Doctor Who back in the 9th 10th Doctor eras) This looks like the real thing here.
(6:20 into this clip)
Normally you'd shoot using the studio cameras so that it looks as authentic as possible (3 chip 2/3" CCD studio cameras have a very different 'look' to large single-sensor CMOS 'movie' cameras), and also to ensure it is recorded as quickly as possible (Movie-style shooting would usually take too much time). It also allows you to use on-camera prompts easily.
I'm not saying this is definitely the case for the Jurassic World 2 clip - but it has been for other similar shoots AIUI.
If there are elements of 'behind the scenes' 'off camera' filming, those would be shot on movie cameras usually.
I can't comment on whether there are any rules about use of graphics, studios, presenters these days. In the old days the rule of thumb was that you could use an actor on a real set (so it didn't look real), or a real newsreader on a fake set (so it didn't look real).
However ISTR that one series of Spooks used Sky News rather than BBC News throughout (as Sky would allow the use of real newsreaders on a real set for added realism) and then the BBC's approach for subsequent shoots seem to change...