In some countries this has translated into legislation. Slovenia passed a national law to reduce light pollution in 2007, requiring outdoor lighting to be shaded and not exceed certain levels of brightness. Puerto Rico, which has three bioluminescent bays, passed light pollution legislation in 2008. France introduced laws on outdoor lighting in 2019, leading to a 6% decrease in light pollution, and the same year Croatia passed a law restricting lighting levels. At least 17 US states and the District of Columbia have some form of light pollution legislation.