Still other rules forbid "full nudity" in certain districts, which can vary among different areas within the same town. Some parts of the U.S. have laws forbidding the exposure of female nipples or even areolas, thus requiring female dancers to cover these with pasties. These laws are not, however, known to be applied to the exposure of male nipples. Managers, dancers, and other club workers can be cited or arrested by local or federal authorities for violating nudity, drug, and other violations. In February 2010, the U.S. city of Detroit, Michigan banned fully exposed breasts in its strip clubs, following the example of Houston, Texas, which began enforcing a similar ordinance in 2008. The Detroit city council has since softened the rules; eliminating the requirement for pasties but keeping other restrictions. Both municipalities were reputed to have suffered rampant occurrences of illicit activities, including prostitution, all linked to striptease establishments within their cities' limits. Detroit has also drawn attention from the federal government for incidents of human trafficking in its strip clubs. In 2010, the state of Missouri passed a law similar to that of Houston and Detroit, banning full nudity in strip clubs across the state.