Z may not nie bardzo się da coś ułożyć, bo to w ogóle nie pasuje do zakazów, nakazów i powinności (a służy raczej do wyrażania niepewności czy przypuszczeń)
Library
You mustn't use your mobile phone in the library.
You should be quiet in the library.
You should leave your jacket or coat in the cloakroom.
You can't eat and drink in the library.
You have to return books within one month of borrowing them.
If you don't return books on time, you have to pay a fine.
You should return the books in the condition in which you borrowed them.
You can't borrow magazines and books from special collections.
