Parents or guardians are responsible for the safety, conduct, and timely arrival of their children to, from, and at the designated school bus stop before and after the arrival of the school bus for pick up and transport to school and the timely departure of the child after the school bus leaves the designated school bus stop after transporting the children from school. The phrase "arrival of the school bus" includes the time that the school bus assigned to the bus stop activates the required pedestrian safety devices, stops, and loads or unloads students until the school bus deactivates all pedestrian safety devices. (SC CODE OF LAWS - SECTION 59-67-415).