We played March of the Belgian Paratroopers 2003. A former student of mine was an assistant director in east Texas and played the recording for her head director who told her it wasn't a "proper" march. We won OPS with it, so I guess it was. I hear there are parts of the state where almost only Karl King marches are played for UIL (as an unspoken requirement). There are many interpretations as to what is a proper march. To each his or her own. Just clear your UIL selection with your regional secretary.