Men: black dress pants or black khaki pants (no Dickies because of the red tag), white button down shirt (long sleeve), black socks, black dress shoes, and a tie of your choice. No jackets while performing.
Women: You may wear the same as the guys. You may also do a dressy white female blouse with black pants. If you do a dress, it must be all black (no polka-dots or stripes). Dresses or black skirts must be below the knees. Wear black flats or a 1 inch heel at the most. Avoid noisy shoes!
In most cases, you will sit in the audience when not performing, make sure your clothing looks professional and that you act professional when sitting and watching other groups perform.