Discretion??
I was once flying an aircraft for a large mining and construction company. The aircraft carried electronics and had the company's name painted in large letters along each side. I was told that I would have to give our regulator the details of the electronics, and have the company name removed.
I drew a circuit diagram which showed the power wiring feeding through a fuse into a box marked "confidential".
I went to the company legal department, and a young lawyer wrote them a letter suggesting that "the minister should use his discretion" and allow the operation to continue as it was.
The operation did continue without further change.
Rubbery rules??