This European Standard defines three competence levels (Annex B) of personnel acting in the field of cathodic protection, including survey, design, installation, testing and maintenance. It specifies a framework of procedures for the training and certification for the personnel to reach and demonstrate the competence levels. It defines the minimum requirements for certification bodies responsible for this certification. The procedures for certification of cathodic protection personnel should be in accordance with EN ISO/IEC 17024. Competence levels and certification schemes apply to each of the following application sectors: - underground and immersed metallic structures; - marine metallic structures; - reinforced concrete structures; - inner surfaces of metallic container structures. These application sectors are detailed in Annex A. It is not mandatory for a certification body to establish certification in all application sectors or to all levels of competence. A certification body may subdivide application sectors and may combine levels of competence. If such subdivision and/or combination are used by the certification body, it should ensure that the certificates discriminate these divided sectors or combined levels from those defined in this standard.