Conformance marking of products to show compliance is a necessary prerequisite for selling in most industrialized countries and may be a legal or contractual obligation. Product marking may simply show compliance with specific standards or to indicate compliance with all essential or legally imposed safety requirements. CE and UL marks are two of the most widely implemented conformance marks with a number of other regional safety marks around the world. To ease the issue of regional differences, the Certification Body (CB) scheme allows manufacturers who have been issued a CB test certificate by one National Certification Body (NCB) to obtain certification marks from other participating NCBs. The CE Mark was introduced for certain products sold within the European Economic Area to show conformity with legal requirements in respect of relevant safety, health and environmental directives. The use of the CE logo is a manufacturer’s declaration that the product meets these requirements but the logo may also include a four-digit code identifying the authorized third party (Notified Body) involved in assessing conformance. Simple CE marking is allowed under a self-certification process if the risk level of a product is considered minimal. Where a product is CE marked, it can only carry additional markings if these relate to requirements that do not overlap, conflict or distract from the CE marking. The European Commission’s website provides much more extensive information about CE Marking.