According to the Constitution and the 1968 Grand National Assembly's Law on the Organization and Operation of People's Councils, the people's councils are responsible for the implementation of central government decisions and the economic, social, and cultural administration of their particular jurisdictions. Deputies to the people's councils are elected to four-year terms--except for the communes where the term is two years--from single-member constituencies of equal population. Based on population, the _judet_ people's councils may have a maximum of 231, or a minimum of 141, deputies. The membership of the Bucharest People's Council is fixed at 369, and there are 151 deputies on the councils of each of its subdistricts. City people's councils range from eighty-one to 221 deputies, and those of the towns consist of from thirty-five to ninety-one deputies. Commune council memberships range from twenty-five to seventy-one persons. Organized on the basis of highly centralized control, the people's councils function under the general supervision of the Grand National Assembly; and between assembly sessions the councils function under the direction of the Council of State. The Law on the Organization and Operation of People's Councils specifically places the people's councils under the overall leadership of the PCR as the leading political force of the society. To expedite its work, each people's council established an executive committee as its chief administrative organ and a number of permanent committees to which it assigns specific responsibilities. The executive committee, consisting of a chairman, two or more deputy chairmen, and an unspecified number of other members, functions for the duration of the council's term of office. Each of the people's council executive committees also has a secretary, who is appointed with the approval of the next higher ranking council and is considered an employee of the central government rather than of the local executive committee itself. The chairman of executive committees in the cities, towns, and communes are officially considered the mayors of these units. The executive committees are responsible to the people's council that elected them as well as to the executive committee of the next higher council.