Final answer:
True, having an effective Safety Management System (SMS) requires that safety activities be conducted throughout all life-cycle phases of the system to continuously manage emerging hazards and risks.
Step-by-step explanation:
True. To have an effective Safety Management System (SMS), it is important that all the different safety activities are repeated during the various life-cycle phases of the system. This is because hazards and risks can emerge at any stage, and continuous monitoring and assessment are key to managing these effectively. Each life-cycle phase, from design and development to operation and decommissioning, presents unique challenges that must be addressed. Therefore, the implementation of safety measures and the performance of safety activities are not one-time tasks, but rather ongoing processes that help maintain the highest possible levels of safety throughout the system's lifecycle.