Israel

Section 20, subsection (b) states:

Should the Prime Minister be permanently incapacitated, the Government shall be deemed to have resigned on the 101st day during which the Acting Prime Minister served in his place.

Excerpt from legislation on the Government (2001)

Section 21 states: 

(a) The Knesset may, by resolution passed by a majority of its members, declare that for reasons of health the President of the State is permanently unable to carry out his functions…

• (c) If the Knesset resolves as aforesaid, the place of the President of the State shall become vacant on the day of the resolution.

Section 22 states:

(a) The President shall temporarily cease to carry out his functions and exercise his powers:…

• (3) If the House Committee, by a two-thirds majority of its members, on the strength of a medical opinion given in accordance with rules prescribed by the Committee, resolves that for reasons of health the President of the State is temporarily unable to carry out his functions – from the passing of the resolution until the expiration of the period fixed by the House Committee in the resolution or until the House Committee resolves that the President is no longer unable to carry out his functions…

Excerpts from the President of the State (1964) 

Section 20A states:

…(b) Whenever the Chairman of the Knesset notifies the House Committee, or if the House Committee decides, that for reasons of health the Chairman of the Knesset is temporarily unable to carry out his functions, a Vice-Chairman shall serve as Acting Chairman until the Chairman notifies the House Committee or until the House Committee decides that the Chairman is no longer unable to carry out his functions.

(c) When the post of Chairman of the Knesset has fallen vacant - because the Chairman has resigned or has died or because the House Committee has decided that for reasons of health he is permanently unable to carry out his functions - a Vice-Chairman shall serve as Interim Chairman until the Knesset elects a new Chairman.

Excerpt from the Knesset (1958, last amended 1987)