Page ContentTo enhance CATCs' capacity building and reduce the cost of course development, GAT established the qualification process for ICAO ISD validators. ICAO ISD validators are able to conduct validations for the development and implementation of competency-based training (STP/CTP/ITP) in their training organization and in the TPP network. Regional Training Centres of Excellence (RTCEs) are required to train and maintain a minimum of one ICAO ISD validator. All TPP Full Members are greatly encouraged to train their eligible course developers to be qualified as ICAO ISD validators. All qualified ICAO ISD validators will be listed in the roster of ICAO ISD validators in the TPeMS.