Final answer:
Assessors or trainers with relevant expertise are needed to administer various phases of operator training exams, ensuring safe and effective equipment operation.
Step-by-step explanation:
Qualified assessors or trainers are required to administer the Phase 1 initial operator training exam, Phase 2 equipment training exam, and Phase 3 training validation/performance Road test exam. These individuals must have the relevant knowledge and skills to ensure that trainees can operate equipment safely and effectively. The process usually involves theoretical knowledge testing followed by practical skill assessments to validate that the operator can perform the necessary tasks to a satisfactory standard.