77. Vacation of office of Prime Minister and Minister: (1) The office of the Prime Minister shall be vacant in any of the following circumstances:
(a) if he or she tenders resignation in writing to the President,
(b) if a vote of confidence is not passed or a vote of no-confidence is passed against him or her under Article 100,
(c) if he or she ceases to be a member of the House of Representatives,
(d) if he or she dies.
(2) The office of a Minister shall be vacant in any of the following circumstances:
(a) if he or she tenders resignation in writing to the Prime Minister,
(b) if the Prime Minister removes him or her from office,
(c) if the office of Prime Minister falls vacant under sub-clause (a),
(b) or (c) of clause (1),
(d) if he or she dies.
(3) If the office of Prime Minister falls vacant under clause (1), the same Council of Ministers shall continue to act until another Council of Ministers is constituted.
Provided that if the Prime Minister dies, the senior-most Minister shall act as the Prime Minister until a new Prime Minister is appointed.