In 1977, the Parti Québécois government of René Lévesque introduced the "Charter of the French Language" (better known as "Bill 101") to promote and preserve the French language in the province, indirectly disputing the federal bilingualism policy. Initially, Bill 101 banned the use of all languages but French on most commercial signs in the province (except for companies with four employees or fewer), but those limitations were later loosened by allowing other languages on signs, as long as the French version is predominant. Bill 101 also requires that children of most immigrants residing in Quebec attend French-language public schools; the children of Canadian citizens who have received their education in Canada in English may attend English-language public schools, which are operated by English-language school boards throughout the province. The controversy over this part of Quebec's language legislation has lessened in recent years as these laws became more entrenched and the public use of French increased.