A licensed staff member who is at least eighteen (18) years of age remains on the premises at all times when children are present at the facility. There must be at least one licensed staff member for each twelve (12) children on or in that portion of the premises, whether indoors or outdoors, where the children are located at any given time. This staffing ratio must also be maintained both off and on premises whenever any children under the treatment clinic's care are off the premises. No person who is not a "staff member" as defined herein has unsupervised contact with the children. (Ord. 632 §2, 2007)