In 1966, to increase the efficiency of government administration, Jigme Dorji Wangchuck made Thimphu the year-round capital. In May 1968, the comprehensive Rules and Regulations of the National Assembly revised the legal basis of the power granted to the National Assembly. The Druk Gyalpo decreed that henceforth sovereign power, including the power to remove government ministers and the Druk Gyalpo himself, would reside with the National Assembly. The following November, the Druk Gyalpo renounced his veto power over National Assembly bills and said he would step down if two-thirds of the legislature passed a no-confidence vote. Although he did nothing to undermine the retention of the Wangchuck dynasty, the Druk Gyalpo in 1969 called for a triennial vote of confidence by the National Assembly (later abolished by his successor) to renew the Druk Gyalpo's mandate to rule.