This document has been developed to support Member States introducing a competence assessment scheme to satisfy the requirements of EUROCONTROL Safety Regulatory Requirement 5 (ESARR 5) (see EUROCONTROL, 2002). The document proposes a harmonised approach to Basic Training, Qualification Training and System/Equipment Rating Training for Air Traffic Safety Electronics Personnel (ATSEP). It also proposes formal training for instructors and Competence Assessors (CAs) and describes competence assessment schemes for ATSEP, On-Site Training Instructors (OSTIs) and CAs. The document emphasises the importance of human factors / TRM training for ATSEP and also examines safety and language issues.