In 1991 the New Orleans City Council passed an ordinance that required social organizations, including Mardi Gras Krewes, to certify publicly that they did not discriminate on the basis of race, religion, gender or sexual orientation, to obtain parade permits and other public licenses. Shortly after the law was passed, the city demanded that these krewes provide them with membership lists, contrary to the long-standing traditions of secrecy and the distinctly private nature of these groups. In protest—and because the city claimed the parade gave it jurisdiction to demand otherwise-private membership lists—the 19th-century krewes Comus and Momus stopped parading. Proteus did parade in the 1992 Carnival season but also suspended its parade for a time, returning to the parade schedule in 2000.