"the three no's" (an example of an abbreviated slogan or catchphrase)

Another saying is three authorities do not interfere.

Since there are "(lit.) three things that no body governs", which implies that no one has the authority over this place or matter. Therefore this phrase is used to refer to the place or matter that under no jurisdiction and under no one's administration.

a place or matter under no jurisdiction, under no one's control:

to claim not to know the beginning, middle, and end of a matter; to claim complete ignorance (often under false pretense)

ask a person about something and he will tell you that there are actually three things he doesn't know anything about (said of people who do not wish to give out information or cooperate)

dubious, nondescript, shady, neither one thing nor the other