That's an insane interpretation of the law. I don't know or even care what prior jurisprudence says on the matter, it's fucking dumb if it's been interpreted that way.

If the camera took the photo and automatically issued the fine, then sure, I agree. But the camera should be taking the photo and passing it to a human to decide if a fine is warranted or not. And in that case, the human (or more to the point, the organisation the human works for) is the accuser. And the fine should stand, unless a defence explaining how the photo misrepresented the situation can be successfully mounted (similar to how a defence could be mounted explaining that the speed camera was incorrectly calibrated).