Countries that operate a parliamentary system of government are less likely to employ term limits on their leaders. This is because such leaders rarely have a set "term" at all: rather, they serve as long as they have the confidence of the parliament, a period which could potentially last for life. Many parliaments can be dissolved for snap elections which means some parliaments can last for mere months while others can continue until their expiration dates. Nevertheless, such countries may impose term limits on the holders of other offices—in republics, for example, a ceremonial presidency may have a term limit, especially if the office holds reserve powers.