The entire community is under an oath of secrecy to ensure that all hell doesn’t rain down on the lot of them from the mortal world. There are no specific magical preventative measure in place preventing this, but the Atheneum is pretty vigilant about keeping an eye out for such tomfoolery. Historically there has always been the occasional mistake, but with little proof to back up the whole ‘I’m a fairy tale character!’ claim, most of those who decide to let the cat out of the bag are typically classified as nutters anyways.
2) Mortal Interaction.
As the characters live in the mortal world, and are in many ways mortals themselves, it isn’t quite possible to stay out of mortal affairs. However, it is the loose policy that members of the community restrict themselves to doing so in mortal ways, and do not use tale-based powers or magic to interfere with the lives of normal people. Furthermore, while the Atheneum tends towards moral neutrality, it enforces mortal laws out of convenience more than anything else. On occasion they may interfere to keep a community member out of trouble, but should a character commit any of the general litany of common crimes, they will be dealt with privately, or worse, left to the mortal legal system to deal with.
For the sake of discretion, magic is officially restricted by the Atheneum. Those with natural aptitude are allowed to indulge in basic matters of cantrip and prestidigitation, but anything more significant (charms, potions, enchantments, etc) require an appeal to the Atheneum and approval. Naturally, this is a rule often pooh-poohed and even sidestepped, but the powers that be do what they can to prevent casual use.
Magical though the Atheneum and Pentamerone may be, money still does not grow on trees. As such, every Tale over the age of 18 is required to pay a tithe to the Atheneum four times a year. The amount is proportional to that Tale’s income; if they make no income, and live in the Pentamerone, they’re expected to pay their dues in other ways, be it by helping with housekeeping, or running errands for the Librarians.
5) Checking In.
In order to help the Librarians keep track of all the Tales running around the place, Tales are required to check in with their Heads at least once every six months. This is highly subjective to the Tale in question, however; troublemakers may have to check in as often as their Librarian demands it.
There is no official practice in regards to punishment when rules are broken, and the capricious and varied means in which offenses are dealt with (usually depending on who is in charge of the Atheneum at any given time) is a matter of constant scrutiny. Punishments can range from stern warnings to magical enchantments to private imprisonment to leaving offenders to mortal justice. On occasion and in the case of serious crimes death has been used as punishment, though the seriousness of this is somewhat circumvented by the foreknowledge that the offender will re-manifest soon thereafter.