What must be done to covers once installed in walking/working surfaces to ensure safety?

Ensuring safety for covers installed on walking or working surfaces is crucial for preventing accidents and ensuring that workers are aware of potential hazards. Marking the covers with "HOLE" or "COVER" serves as a significant warning to individuals traversing the area. This clear labeling communicates the potential risk directly, helping to prevent accidental falls or missteps. Proper signage is a vital part of workplace safety protocols and regulations, as it enhances situational awareness and encourages caution.

While other options may have their merits, they do not effectively address the immediate need for worker awareness in the vicinity of potential hazards associated with access points or areas covered. Therefore, marking these covers with clear and visible identifiers is key to maintaining a safe working environment.