The experts are publicly appointed and sworn in by the Chamber of Crafts. The basis for this is formed by the Crafts Code, Trade Regulations and the Expert Regulations. The Chamber of Skilled Crafts verifies the personal suitability and the special expertise of the experts appointed by them before the appointment and during the term of the public appointment. The publicly appointed and sworn experts shall render their expert opinions independently, free of instructions, personally, conscientiously and impartially to the best of their knowledge and belief. Every expert in the trade is bound to secrecy towards third parties. Experts work for courts, institutions, companies and consumers.