Boundaries Do Not Break. They Get Traded.
Nobody votes to abandon a standard. Someone makes one exception that is reasonable, then a smaller one, and a year later the standard is gone and no one can name the meeting where it went.
You had a rule. Anything that leaves the unit gets a second reader before it goes. It held for two years, and then there was a Thursday when the client moved the deadline, the second reader was out, and sending the thing unread was plainly better than missing the date. You made that call yourself. You were right.
The next one was easier, because you had done it once and nothing broke. Someone made the third call without asking you, which was reasonable of them, since you had already established what happens under time pressure. Now it is eighteen months later, the second read happens when there is room for it, and you would have to go back through your calendar to find the last piece that actually got one. No one decided this. There is no meeting where it was decided, which is exactly why nobody defends it and nobody feels responsible for it.
Every trade is defensible on the day it is made
The reason this pattern is so hard to catch is that each individual exception is correct. The deadline really had moved. The reader really was out. Holding the standard that Thursday would have cost a client relationship in exchange for a document that was probably fine, and a leader who cannot make that trade is not exercising judgment, they are reading a policy aloud.
What goes wrong is not the trade. It is the record of it. An exception granted under pressure almost never gets written down as an exception, because writing it down takes fifteen minutes you do not have on the day you need those fifteen minutes most. So the exception enters the unit's memory as a thing that happened, not as a thing that was permitted once. The next person facing a similar Thursday does not compare their situation to the written standard. They compare it to what happened last time, because that is the more recent and more concrete piece of evidence available to them.
That is the whole mechanism. The comparison point moves. Each new decision is measured against the most recent practice rather than the original rule, so the distance between any two consecutive steps stays small enough to look reasonable, while the distance between where you started and where you are is large enough that it would have been rejected outright if anyone had proposed it in one move.
What it costs before you notice
The person who holds the line becomes the problem. Once the practice has drifted, the standard is only enforced by whoever is most stubborn about it, usually a mid-level person with no ability to grant exceptions. They start looking rigid, difficult, and hard to work with, because they are applying a rule that everyone else has quietly stopped applying. In most units this person eventually stops. They are not persuaded. They just get tired of being the obstacle, and when they stop, the last visible trace of the standard goes with them.
People stop planning around a rule they cannot predict. A standard is useful mainly because it lets other people organize their work in advance. When the second read is guaranteed, everyone builds a day of slack into their schedule for it. When it is discretionary, they stop building in the day, which means the next time you want the read done properly there is no room in anyone's week to do it. The standard does not only fail on the day it is skipped. It removes the conditions that made keeping it possible.
You lose the ability to say no later. The most expensive part arrives when something genuinely does need to be held. You go to reinstate the requirement and discover you cannot do it without it looking personal, because for eighteen months you approved every version of this request and now you are refusing this one. Whoever gets refused is entitled to ask what is different about them. You will not have a good answer, since the honest answer is that you have been running on accumulated exceptions and this one happened to arrive after you noticed.
Three things that catch it earlier
Write the exception down as an exception, on the day. Two sentences in a shared place: what the standard is, what happened instead, why, and when the standard resumes. This takes almost no time and it does one useful thing, which is to keep the written rule as the comparison point for the next person instead of your Thursday decision. A unit that has a list of nine exceptions is in far better shape than a unit that has none because nobody ever recorded any.
Count them rather than judging them. Every individual case will pass inspection, so do not inspect the cases. Look at the number. Nine exceptions in a quarter to a rule you believe in is the finding, and it does not require you to decide which of the nine were wrong. If the count is high, you are looking at one of two things: a standard nobody actually supports, or conditions that make it impossible to meet. Both are worth knowing, and neither is visible one case at a time.
Say out loud which standards are not tradeable. Most of what a unit does should be negotiable under pressure, and pretending otherwise produces rules that get broken and then ignored. Pick the small number that are not, name them in a room where people can hear you, and then hold them the first time it costs you something. That first refusal is the whole thing. Everyone in the unit will read it, and it will do more work than a year of restating the policy.
The ones you trade first are your own
Before you go looking at the unit, look at what has drifted on your own calendar. The evening you protected. The meeting you said you would not take. The decision you promised yourself you would push back down instead of absorbing. Every one of those went the same way, through a defensible exception on a week that warranted it, and none of them got recorded either.
This matters beyond your own hours, because your standards are the ones people watch most closely for evidence about what is real here. A leader who answers messages at eleven at night has not asked anyone to do that, and has communicated it anyway. The rule you enforce is the one you keep when keeping it is inconvenient. Everything else is a preference you have expressed.
Three questions
Name a standard your unit had two years ago that it no longer has. Not one that was formally changed, one that stopped. Can you identify the first exception, and could you have predicted at the time that it was the first one?
Pick your most important rule and count the exceptions to it this quarter. If you cannot count them because nothing was recorded, that is your answer, and the count is almost certainly higher than the number you would have guessed.
What did you refuse in the last month that cost you something? If nothing comes to mind, your team has not seen you hold a line recently, and they are calibrating on what they have seen.