The IBRD has 189 member governments, and the other institutions have between 153 and 184. The institutions of the World Bank Group are all run by a board of governors meeting once a year. Each member country appoints a governor, generally its Minister of Finance. On a daily basis the World Bank Group is run by a board of 25 executive directors to whom the governors have delegated certain powers. Each director represents either one country (for the largest countries), or a group of countries. Executive directors are appointed by their respective governments or the constituencies.