This reservation covers the regulation and control of the standards of products which are put on the market or into service so as to observe and implement the relevant EC law, notably the European Single Market Harmonisation Directives which have as their purpose the smooth functioning of the single market by removing potential barriers to trade. Also reserved under this heading are product safety and liability and product labelling. These matters too are reserved in order to ensure that a single market is maintained within the UK.
Exceptions from these reservations are made for food, agricultural produce, fish products and certain agricultural products in line with the general devolution of food standards, agriculture and fisheries.