Some standardisation of labels, such as minimum type sizes and requirements for clarity can be achieved, but if carried to extremes one will be in danger of choosing a can of tuna instead of rice pudding because all labels look alike. Date marking for perishable goods is necessary but the label is no place to describe exactly what it means. Nutrition labelling again can provide far too much information, and some of the requested information would be positively misleading. Giving fat as percent of total calories, for instance, means nothing in itself. It is the proportion of total daily energy as fat from the entire day's food intake which is relevant.
Some foods are naturally high in sucrose, which is no different from added sucrose.
It is often impossible to guarantee that a food does not contain traces of nuts protein, even although nuts are not an ingredient. It is usually the RDA for an adult male, but the values could be quite erroneous if the consumer is an adult female, pregnant, a little old lady or a child of six. Adult males are a minority of the population. There is a real danger of getting altogether too clever over food labels. There is an urgent need to define a minimum list of required declarations, and keep all other information for leaflets, web pages or phone enquiries.