The Provincial Parliament is modelled on the Westminster system. The executive head of the provincial government, the Premier of the Western Cape, is elected by the Members of the Provincial Parliament from amongst themselves; conventionally the Premier will be the leader of the largest party in the parliament. The Premier then chooses the members of the Provincial Cabinet, who must also be MPPs. The Provincial Parliament also has the power to force the Premier and Cabinet to resign, by passing a motion of no confidence. The legislative power of the Provincial Parliament is restricted to certain fields enumerated in the national Constitution; in some of these fields, the power is shared with the national Parliament. The fields on which the Provincial Parliament may legislate include health care, primary and secondary education, agriculture, transport, and land use planning. It also controls the budget of the provincial government departments. Legislation may be introduced by any member, except formoney bills, which may be introduced only by the Provincial Minister of Finance. Laws passed by the Provincial Parliament must be signed by the Premier before coming into effect. The Premier may refer a bill back to Parliament for reconsideration if she or he believes it is unconstitutional. If the Parliament re-passes it, then the Premier must either sign it or refer it to the Constitutional Court, which can make a final decision on its constitutionality.
Election
The provincial legislature consists of 42 members, who are elected through a system of party list proportional representation with closed lists. In other words, each voter casts a vote for one political party, and seats in the legislature are allocated to the parties in proportion to the number of votes received. The seats are then filled by members in accordance with lists submitted by the parties before the election. The legislature is elected for a term of five years unless it is dissolved early. This may occur if the legislature votes to dissolve and it is at least three years since the last election, or if the Premiership falls vacant and the legislature fails to elect a new Premier within ninety days. By convention, all nine provincial legislatures and the National Assembly are elected on the same day. The most recent election was held on 8 May 2019. The following table summarizes the results. The following table shows the composition of the provincial parliament after past elections and floor-crossing periods.
In February 2020, the ruling Democratic Alliance proposed increasing the number of the seats in the Provincial Parliament to between 52 and 60 seats. The proposal is supported by the African National Congress, yet it has also been denounced by Good.