http://static.nytimesn7cgmftshazwhfgzm37qxb44r64ytbb2dj3x62d2lljsciiyd.onion/email-content/TZ_sample.html
Whether that gets translated into actual dress codes is another matter, but “appropriate,” the current word of choice regarding wardrobe and the workplace, is pretty open to interpretation. That said, dress has been a form of rebellion against pretty much any kind of norm, gender included, since Joan of Arc donned male armor in the 15th century.