Below is what I was able to find:
- "Costumes must be family-friendly and not obstructive, offensive, violent or objectionable. Costumes must not contain weapons that resemble or could be mistaken for real weapons. Costumes may not contain sharp or pointed objects, or materials that might accidentally strike another guest."
Bottom line, as long as they are not too graphic or revealing (adult natured), I think they would be fine.