canes are afforded the right-of-way when crossing a road. They are afforded the right to use their cane in any public place as well. In some cases, it is illegal for a non-blind person to use a white cane with the intent of being given right-of-way. In November 2002, Argentina passed a law recognizing the use of green canes by people with low vision, stating that the nation would "adopt from this law, the use of a green cane in the whole of Argentina as a means of orientation and mobility for people with low vision. It will have the same characteristics in weight, length, elastic grip and fluorescent ring as do white canes used by the blind." In Germany, people carrying a white cane are excepted from the (trust principle), therefore meaning that other traffic participants should not rely on them to adhere to all traffic regulations and practices. Although there is no general duty to mark oneself as blind or otherwise disabled, a blind or visually impaired person involved in a traffic accident without having marked themselves may be held responsible for damages unless they prove that their lack of marking was not causal or otherwise related to the accident. Children and canes In many countries, including the UK, a cane is not generally introduced to a child until they are between 7 and 10 years old. However, more recently canes have been started to be introduced as soon as a child learns to walk to aid development with great success. Joseph Cutter and Lilli Nielsen, pioneers in research on the development of blind and disabled children, have begun to introduce new research on mobility in blind infants in children. Cutter's book, Independent Movement and Travel in Blind Children'', recommends a cane to be introduced as early as possible, so that the blind child learns to use it and move around naturally and organically, the same way a sighted child learns to walk. A longer cane, between nose and chin height, is recommended to compensate for a child's more immature grasp and tendency to hold the handle of the cane by the side instead of out in front. Mature cane technique should not be expected from a child, and style and technique can be refined as the child gets older. See also GPS for the visually impaired Tactile paving Guide dog Guide horse Assistive cane Hoople (mobility aid)