Pakistan

(1) There shall be [three hundred and thirty-six] seats for members in the National Assembly, including seats reserved for women and non-Muslims.⁸
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(4) In addition to the number of seats referred to in clause (3), there shall be, in the National Assembly, ten seats reserved for non-Muslims.
(5) The seats in the National Assembly shall be allocated to each Province and the Federal Capital on the basis of population in accordance with the last preceding census officially published.
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(6) For the purpose of election to the National Assembly,-
(a) the constituencies for the general seats shall be single member territorial constituencies and the members to fill such seats shall be elected by direct and free vote in accordance with law;
(b) each Province shall be a single constituency for all seats reserved for women which are allocated to the respective Provinces under clause (3);
(c) the constituency for all seats reserved for non-Muslims shall be the whole country;
(d) members to the seats reserved for women which are allocated to a Province under clause (3) shall be elected in accordance with law through proportional representation system of political parties’ lists of candidates on the basis of total number of general seats secured by each political party from the Province concerned in the National Assembly:
Provided that for the purpose of this paragraph the total number of general seats won by a political party shall include the independent returned candidate or candidates who may duly join such political party within three days of the publication in the official Gazette of the names of the returned candidates; and
(e) members to the seats reserved for non-Muslims shall be elected in accordance with law through proportional representation system of political parties’ lists of candidates on the basis of total number of general seats won by each political party in the National Assembly:
Provided that for the purpose of this paragraph the total number of general seats won by a political party shall include the independent returned candidate or candidates who may duly join such political party within three days of the publication in the official Gazette of the names of the returned candidates. (Art. 51)

(1) The Senate shall consist of [ninety-six] members, of whom,-
(a) fourteen shall be elected by the members of each Provincial Assembly;
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(c) two on general seats, and one woman and one technocrat including aalim shall be elected from the Federal Capital in such manner as the President may, by Order, prescribe;
(d) four women shall be elected by the members of each Provincial Assembly;
(e) four technocrats including ulema shall be elected by the members of each Provincial Assembly; and
(f) four non-Muslims, one from each Province, shall be elected by the members of each Provincial Assembly:
Provided that paragraph (f) shall be effective from the next Senate election after the commencement of the Constitution (Eighteenth Amendment) Act, 2010.
(2) Election to fill seats in the Senate allocated to each Province shall be held in accordance with the system of proportional representation by means of the single transferable vote.
(3) The Senate shall not be subject to dissolution but the term of its members, who shall retire as follows, shall be six years:-
(a) of the members referred to in paragraph (a) of clause (1), seven shall retire after the expiration of the first three years and seven shall retire after the expiration of the next three years;
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(c) of the members referred to in paragraph (c) of the aforesaid clause,-
(i) one elected on general seat shall retire after the expiration of the first three years and the other one shall retire after the expiration of the next three years; and
(ii) one elected on the seat reserved for technocrat shall retire after first three years and the one elected on the seat reserved for women shall retire after the expiration of the next three years;
(d) of the members referred to in paragraph (d) of the aforesaid clause, two shall retire after the expiration of the first three years and two shall retire after the expiration of the next three years;
(e) of the members referred to in paragraph (e) of the aforesaid clause, two shall retire after the expiration of the first three years and two shall retire after the expiration of the next three years; and
(f) of the members referred to in paragraph (f) of the aforesaid clause, two shall retire after the expiration of first three years and two shall retire after the expiration of next three years:
Provided that the Election Commission for the first term of seats for non-Muslims shall draw a lot as to which two members shall retire after the first three years.
… (Art. 59)

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(6) When a seat reserved for women or non-Muslims in the National Assembly or a Provincial Assembly falls vacant, on account of death, resignation or disqualification of a member, it shall be filled by the next person in order of precedence from the party list of the candidates to be submitted to the Election Commission by the political party whose member has vacated such seat.
Provided that if at any time the party list is exhausted, the concerned political party may submit a name for any vacancy which may occur thereafter. (Art. 224)

(1) Each Provincial Assembly shall consist of general seats and seats reserved for women and non-Muslims as specified herein⁹ below:-
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(3) For the purpose of election to a Provincial Assembly,­-
(a) the constituencies for the general seats shall be single member territorial constituencies and the members to fill such seats shall be elected by direct and free vote;
(b) each Province shall be a single constituency for all seats reserved for women and non-­Muslims allocated to the respective Provinces under clause (1);
(c) the members to fill seats reserved for women and non-Muslims allocated to a Province under clause (1) shall be elected in accordance with law through proportional representation system of political parties’ lists of candidates on the basis of the total number of general seats secured by each political party in the Provincial Assembly:
Provided that for the purpose of this sub-clause, the total number of general seats won by a political party shall include the independent returned candidate or candidates who may duly join such political party within three days of the publication in the official Gazette of the names of the returned candidates. (Art. 106)

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(6) When a seat reserved for women or non-Muslims in the National Assembly or a Provincial Assembly falls vacant, on account of death, resignation or disqualification of a member, it shall be filled by the next person in order of precedence from the party list of the candidates to be submitted to the Election Commission by the political party whose member has vacated such seat.
Provided that if at any time the party list is exhausted, the concerned political party may submit a name for any vacancy which may occur thereafter. (Art. 224)