Mayor Bill de Blasio on Tuesday signed a bill that adds a third gender category on birth certificates issued in New York City. The new non-binary identity category, known as X, is for those who don’t consider their gender to be male or female. A letter from a physician or an affidavit by a licensed health care provider will no longer be provided. Residents can now submit their own affidavit requesting a change in gender identity. “New Yorkers should be free to tell their government who they are, not the other way around,” de Blasio said. “This new legislation will...