For [group-photo material I am authorised to use], my preference on combining expressions or backgrounds from different photos is [scope I would consider / no such combination]. If content from another photo is proposed, can you obtain separate confirmation first? Which requests still need assessment? If compositing is chosen, can the delivered composite be labelled and the corresponding non-composited version retained? I do not treat a composite as an original single-exposure image or request guaranteed results. Processing is not yet authorised.