In addition to the definitions set forth in section 15-41, the following words, terms and phrases, when used in this division, shall have the meanings ascribed to them in this section, except where the context clearly indicates a different meaning:
Lightning prediction system means the lightning prediction warning system installed in all parks that provides an audible warning signal if there is a threat of lightning within the area of the park and recreational area.
Supervisory personnel means all adults exercising care, custody, or supervision over minor children engaged in a youth activity in a park or recreational area, including, but not limited to, team coaches, managers, group leaders, and their assistants. This term includes the league, association, and organization that administers, sponsors, manages, employs, or is in control of the adults exercising care, custody, or supervision over the minor children engaged in the youth activity in a park or recreational area. This term also includes the league, association, and organization that administers, sponsors, manages, or is in control of the specific youth activity for the minor children in the park or recreational area.
Youth activity means any sport or other activity carried on in any park or recreational area in which minor children are supervised by adult leaders.