(41)To appeal to the average consumer and to serve the informative purpose for which it is introduced, and given the current level of knowledge on the subject of nutrition, the nutrition information provided should be simple and easily understood. To have the nutrition information partly in the principal field of vision, commonly known as the ‘front of pack’, and partly on another side on the pack, for instance the ‘back of pack’, might confuse consumers. Therefore, the nutrition declaration should be in the same field of vision. In addition, on a voluntary basis, the most important elements of the nutrition information may be repeated in the principal field of vision, in order to help consumers to easily see the essential nutrition information when purchasing foods. A free choice as to the information that could be repeated might confuse consumers. Therefore it is necessary to clarify which information may be repeated.