Given that what I know as Hall Cosplay is just wearing your costume around the con, I suggest you contact the people who made the rules for clarification on what they've got in mind. All contests are a little different.
Tom Petty [Final Fantasy XV] (9%)
Bondage Finch [Bondage Finch Adventures] (12%)
Melisandre, the Red Woman [Game of Thrones] (43%)