MNSSHP 2016 Details w/ New Costume Policy

Full story:
https://disneyparks.disney.go.com/blog/2016/03/mickeys-not-so-scary-halloween-party-spooks-walt-disney-world-guests-29-nights-this-fall/

"New this year, we have revised our costuming guidelines for special events in our theme parks. While costumed attire may be worn, guests ages 14 and older are strongly discouraged from wearing layered costumes or costume props that surround the entire body as they may be subject to additional security screening. Additionally, costumes may not contain any weapons that resemble or could easily be mistaken for an actual weapon."