If you want to hold an event, you need the so-called determination of the competent authority. You must apply for this in writing.

In the context of the approval procedure, weekly, annual or special markets are considered to be events.

• A weekly market is a regularly recurring, time-limited event at which a large number of vendors offer, for example, food and raw natural products.
• A special market is one where specific goods are usually offered at regular intervals for a limited period of time.
• All kinds of goods are offered at fairs. In general, fairs are events that recur regularly at longer intervals and are limited in time.
• If you, as an organizer, want to offer a weekly, annual or special market, you must apply for a determination (permit) from the competent authority. The permit means that you as an organizer are exempt from some commercial obligations (for example, travel tissue map, compliance with store closing times).
• Organizers are natural persons and legal entities. Cities also often act as organizers, mainly in the case of weekly markets. If the market takes place in public space, a special use permit is required. In the application procedure, the competent authority checks the reliability of the applicant.
  

With the determination you as the organizer are allowed to hold the fair, exhibition or market, but at the same time you are also obliged to carry out the event. These types of events are exempt from the provisions of the Shop Opening Act and the Public Holiday Act.