Every job I have worked, there's the rules, and the actual rules. The rules are what is written down, the actual rules is what is enforced.

If the company wants you out or considers you low value/high maintenance, they use the rules. If the company likes you, they use the actual rules. If you are on the promotion track, they use the actual rules.

Also, it turns out the actual rules actually have serious revisions as you go up the corporate ladder - things that would get you fired might not get your boss fired, and definitely wont get the CFO fired.