Which of the following is a condition for the imposition of a stop work order?

The condition for the imposition of a stop work order relates to ensuring that construction work is being performed safely and in accordance with approved plans. In this context, the absence of an approved Safe Work Plan (SWP) is a serious concern because the SWP outlines the safety measures and procedures that must be followed on site. Without an approved SWP, there is a higher risk of unsafe conditions and practices, which can lead to accidents and harm to workers.

The presence of an approved SWP is critical in construction projects; it serves as a guideline to prevent safety violations. When it is lacking, the authorities may decide to halt all work to mitigate potential hazards until proper safety measures are established and documented.

The other options do not directly relate to the core requirements for enforcing a stop work order in the context of safety. Experience levels of workers, the timing of work tasks, or the existence of a signed contract are separate considerations that, while important for various aspects of construction management and contract law, do not directly trigger the need for immediate safety intervention such as a stop work order.