A provider shall limit the hours of care to the approved hours of operation stated on the certificate of registration. A provider may not offer overnight care without prior written approval from the office. A provider who wishes to provide overnight care shall: Submit to the office a written plan of operation that includes: The number and ages of children to be served; A meal and snack schedule; The name of the overnight care substitute, if different from the daytime care substitute; A child supervision plan; A bedtime routine; and An evacuation plan for each room where a child in care will sleep; and Obtain the written approval of each child's parent for the child's sleeping arrangements.