For a child restraint to be sold or used within any of the 56 UNECE member states it must be approved by the standards of UNECE Regulation 44/04, Directive 77/541/EEC or any other subsequent adaptation thereto. In order to be granted ECE R44 approval the child restraint must comply with several design, construction and production conformity standards. If approval is granted the seat can display an orange label with the unique approval license number, the type of approval, the mass group approved for and the details of the manufacturer.