I would generally think so too, but the best bet is to ask the director to be sure. Some competitions can be run really weirdly and I'm never certain if giving the generally-speaking rules advice applies to any specific con.
Founder and President, Madison Area Costuming Society, a chapter of the International Costumer's Guild
Strange Land Costuming - www.strangelandcostumes.com
Director, SF&F Masquerade
- COSTUMECON34 - Madison, Wisconsin - May 6-9, 2016 - www.costumecon34.com