In order to assess for the purpose of the practical instructional techniques course for OJTIs/STDIs, the person shall hold an assessor endorsement and shall have 3 years’ OJTI/STDI experience. This means that only persons who have held at least an ATCO licence can perform such assessments. Currency is not a requirement. This is to ensure that the person in question is capable of maintaining safety during the assessment and capable of fully assessing the skills that are needed for the future OJTI in relation to maintaining safety. The human factor expert in the example may be the most appropriate person to deliver the course, but is not trained for assessing their applicants in the operational context and to verify the safety element to be possessed by the future OJTI.