And "large scale" means how many records in DB? How many users? Or records per day?
If
* core activities * require * large scale * regular * systematic
If you tick all those other boxes, but are concerned that your processing may be teetering on the boundary of 'large scale', I would be cautious and assume your liable.
I agree that it is safer to imply you're liable.
The above statement will apply to everybody or nearly everybody (still not you).