"Rules are best when they are treated as resources, not commands.
Standards protect teams from the most common lie: “just this once.” In a disagreement about safety margins and speed, the purpose is not to be strict; it is to stay consistent under stress.
In a disagreement about safety margins and speed, people comply with what is enforced, not what is written. If exceptions are informal, you end up with a standard no one can defend and a process no one trusts. Define the decision rights before the crisis, or the crisis will define them for you.
Karl E. Weick is useful here because it forces precision. Re-state the standard as a yes/no check and make the exception path explicit and narrow. Keep it short enough to remember under stress.