The guidelines stipulate that Folha's journalism should be descriptive and accurate, but that themes that cause controversy can admit to more than one viewpoint and require a pluralistic treatment. Folha also became known for its highly diverse selection of columnists. At the same time, checks and balances were instituted through internal controls: the Manual, the daily "Corrections" section adopted in 1991, a rule stating that objections to any article expressed by readers or for people mentioned in the news should be published, and, above all, the ombudsman position created in 1989; this position entails job security for its holder, whose aim is to criticize Folha and deal with complaints by readers and people mentioned in the news.