You must turn off your mobile phone.
You mustn't go to the theatre in the evenings if you are under age 6.
You must be quiet during the performance.
You mustn't take food to the hall of the theatre. If you are hungry, you should wait until the break.
You mustn't take photos without administrator's permission.
You must go to the hall before the third call.
You mustn't smoke in the hall.
You mustn't drink any strong drinks.
You mustn't take cutting and piercing items, any type of the gun.
You mustn't go to the theatre if you're ill. Coughing and sneezing can interrupt actors.
If you want to give flowers to the actors, you must ask the administrator's permission. Safety is above all.