The experts are publicly appointed and sworn in by the Chamber of Crafts. This is based on the Crafts Code, the Trade Regulation Act and the Expert Regulations. The Chamber of Skilled Crafts checks the personal suitability and special expertise of the experts it appoints before they are appointed and for the duration of their public appointment. The publicly appointed and sworn experts must provide their expert opinions independently, without instructions, personally, conscientiously and impartially to the best of their knowledge and belief. All trade experts are obliged to maintain confidentiality towards third parties. Experts work for courts, institutions, companies and consumers.