Interim Prime Minister), after 100 consecutive days, when the Prime Minister, legally, is deemed to be permanently incapacitated, since the "100 consecutive days" was set by law as a limit, not a delegated authority, inasmuch limit for the incumbent to be temporarily incapacitated in office and a limit for the Acting Prime Minister to act in the Incumbent's office. The aftermath of any event, where the incumbent becomes permanently incapacitated (either declared as such or the "100 consecutive days" limit expired or else), as well as in the event of the incumbent's death or the incumbent was convicted of an offence, are addressed by the law separately. In these cases, the Government that is "deemed to have resigned" to become an interim government, and with the absence of a Prime Minister in office, requires a cabinet vote on one of its members (either the Acting Prime Minister or else) who must be a Knesset member and (from the 2001 law) a member of the Prime Minister's Party as well, to assume office as an Interim Prime Minister, until a new government is placed in power (the 1968 law did not impose time limit on a "temporarily incapacitation" period of the Incumbent Prime Minister, but rather pending the return of the incumbent to resume his duties, and separately addressed only the event of death of the incumbent, while failing to address Permanent incapacitation or criminal conviction of the Incumbent Prime Minister). Ehud Olmert, after standing-in for Prime Minister Sharon for 100 consecutive days, as acting Prime Minister, did not automatically assume office as an Interim Prime Minister. The Government voted to appoint him, and in addition, he was also a member of Prime Minister's Party, which enabled them to appoint him to the role Practically, the use of this position started only 1984 during the 11th Knesset, with the first person to hold the position, Yitzhak Shamir, taking office on 13 September 1984. A Coalition deal between the Labour Alignment and Likud stipulated that Shimon Peres would be Prime Minister for the first two years of the Knesset term (out of four years), with Yitzhak Shamir serving as the designated Acting Prime Minister, and then swap places with Shamir for the next two. The major political parties, right-wing Likud party, then headed by Yitzhak Shamir, and Labour, then headed by Shimon Peres, did not gain enough seats in parliament, during the