It is a manner and etiquette as what to wear, how to eat, talk and bow down before the government officials and the clergy. The Driglam Namzha was imposed on all citizens from 1990. The people of different ethnic heritage for example the Lhotsampas (Bhutanese citizens of ethnic Nepali origin – they were not Bhutanese citizens and they were not Lhotsampas) resented this and revolted against this imposition, thereby getting kicked out of Bhutan to the refugee camps. About 20% of Bhutan's population currently live in exile because of this Bhutanization policies of the Royal Government followed by land expropriation and persecution.