Relevant excerpt
Women
A clean and well-cared-for appearance should be maintained. Clothing is inappropriate when it is sleeveless, strapless, backless, or revealing; has slits above the knee; or is form fitting. Dresses and skirts must be knee length of longer. Hairstyles should be clean and neat, avoiding extreme styles and colors. Excessive ear piercing (more than one per ear) and all other body piercing are inappropriate.