An official prime minister is or was always voted, along with the government he formed in the parliament, in an approval "vote of confidence" by the majority of this elected branch, the Knesset, with the expectation to serve, along with his government, until the end of the Knesset full term, either if he began serving after a newly elected Knesset or in the midst of the Knesset term, unless his government later became an "interim government", that is legally "deemed" to have lost that vote, and as opposed to an "interim prime minister", appointed by such a government, and without the approval vote of the Knesset, to serve along only until a new government will be placed in power.