During an off-site activity, the provider or substitute shall exercise reasonable care to protect children from potentially hazardous areas and situations. If the outdoor activity space is not on the premises, the provider or substitute shall accompany and supervise a child of any age in transit to and from the space and while at the space. Before a child may participate in a supervised activity out of the home without the provider or substitute, responsibility for the child's whereabouts and supervision shall be clearly assigned throughout the period of the activity. A child in care may not travel to or from school or a school transportation site without adult supervision unless the child is in the first or a higher grade.