Messenger Shield awarded to the winner of the Port Adelaide District Schools, Annual Lightening Football Carnival. Lightning football is a shortened variation of Australian Rules football, often played at half of the duration of a full match. It is typically used as a means to accommodate a small tournament inside a single day or weekend. This football shield was sponsored by Messenger newspapers. Reflective of the popularity of Australian Rules football at school level in South Australia. The South Australian Football League was the first to initiate 'lightening' competitions, comprising matches of shorter duration.