On 1 January 2004, a reform of the German Crafts Code came into force. It cut the number of crafts that require a master craftsman, a Meister, from 94 to 41. The lawmakers kept the requirement for crafts they considered gefahrgeneigt, prone to danger. The federal government later explained the term. These are crafts in which proper work, aimed at avoiding danger to the life or health of others, as a rule requires an especially thorough training. The draft law of 2003 gave examples. Installation and safety work carries a higher risk of electric shocks and explosions, and the same applies to the electrical crafts. Mistakes in roofing and in demanding scaffolding can cause considerable danger. In the health crafts, wrong measurements or poor fitting, for example by an optician or an orthopedic technician, can harm the patient.