While the acting prime minister must be a Knesset member to meet the requirements, the interim prime minister must be a member of the prime minister's party as well. Until the 2001 basic law: the government, both the acting and interim prime ministers were only required to be a Knesset member in addition to being a member of the Government. However, before and after the 2001 law, an interim prime minister would not be appointed unless the government would be voting on one of their members (either the acting prime minister or else) to be the interim prime minister until a new government is placed in power.