Brothel prohibition made it difficult to set rules for the sex industry. During the eighties many municipalities urged the national government to lift the ban on brothels. In 1983 minister Korthals Altes had presented an amendment to the law on prostitution. It took until 1 October 2000 for brothels to leave the half-legal status of being tolerated and to become fully legal and licensed businesses. Prostitutes may work as regular employees, though the vast majority work as independent contractors. The Dutch union FNV has accepted prostitutes as members since that time.