Final answer:
The correct statement regarding hole covers is that they must be load-rated and secured, according to safety regulations, to prevent falls and injuries. This requirement applies to all hole covers, regardless of the size of the opening.
Step-by-step explanation:
The true statement regarding hole covers among the given options is that hole covers must be load-rated and secured. This is to ensure safety and prevent accidents that could occur if someone were to step on an inadequately protected or uncovered hole. Hole covers serve as a barrier to protect workers and equipment from falling through openings and must adhere to specific regulatory safety standards. They must be capable of supporting the weight that might be imposed on them during normal operations and they need to be secured to prevent accidental displacement.
It is not accurate that hole covers are not required by regulations, as they are often mandated by occupational safety and health regulations to prevent falls and injuries at worksites. They are also not only needed for large openings; any hole that presents a fall hazard should be covered regardless of its size. Lastly, hole covers are not optional, as their use is critical for maintaining workplace safety and compliance with safety regulations.