Before operating a dual control switch by hand, what first step should be taken?

When operating a dual control switch by hand, the first important step is to receive permission from the control operator. This is a critical safety measure to ensure that the switch operation is coordinated with any ongoing train movements and that it will not interfere with any signals or actions being monitored by the control operator. By obtaining permission, the conductor ensures that all safety protocols are observed and that they are compliant with operational procedures. This step protects both the crew and train operations from potential accidents or miscommunication that could arise from uncoordinated actions.