The chief minister of Punjab is the head of the government of Punjab. As per the Constitution of India, the Governor of Punjab is the state's head, but de facto executive authority rests with the chief minister. Following elections to the Punjab Legislative Assembly, the governor usually invites the party (or coalition) with a majority of seats to form the government. The governor appoints the chief minister, whose council of ministers are collectively responsible to the assembly. Given that he has the confidence of the assembly, the chief minister's term is for five years and is subject to no term limits.
History
Punjab Province (1937-1947) The province of Punjab was then headquartered in Lahore.Under the Government of India Act 1935, a bicameral legislature was set up with a legislative assembly and a legislative council with a government headed by the Prime Minister. The Unionist Party won the Punjab Provincial Assembly elections, 1937 and Sir Sikandar Hayat Khan became the Premier of Punjab and hold the position up to his death in 1942. Khan was succeeded by Sir Khizar Tiwana. In 1946 elections were held the Unionist Party stood fourth place but with the support of Indian National Congress and Shiromani Akali Dal formed the government under Sir Khizar Tiwana. Tiwana later resigned on 2 March 1947 against the decision of Partition of India.
Patiala and East Punjab States Union (1948-1956) Patiala and East Punjab States Union or PEPSU was an Indian state formed by the union of the post-partition province of Punjab on the Indian side of the border with eight princely states, which were allowed to maintain their native monarchs. The state was inaugurated on 15 July 1948 and formally became a state in 1950. Among these princely states, six were salute states:- Patiala, Jind, Kapurthala, Nabha, Faridkot and Malerkotla. The other two states were Nalagarh and Kalsia. PEPSU was earlier headed by the Premier, from 1952 the chief minister become the head of the government. On 1 November 1956, PEPSU was merged mostly into East Punjab( Punjab from 1950) following the States Reorganisation Act, 1956.
East Punjab (1947-1966) The state of East Punjab was formed in 1947 later it was renamed Punjab in 1950. It consisted of the parts of the Punjab Province of British India that went to India following the partition of India. Since 1947, Punjab has had fifteen chief ministers. The first was Gopi Chand Bhargava of the Indian National Congress party, who was sworn in on 15 August 1947, when India gained independence from the British. He was succeeded by fellow Congressman Bhim Sen Sachar, who was then subsequently replaced after 188 days by former Chief Minister Gopi Chand Bhargava. After a brief term, President Rajendra Prasad placed the Punjab Legislative Assembly under suspension for ninth months to help the state government gets its act together. In 1952, the first state elections took place for the Legislative Assembly. The results of the election saw the return of the Congress government with former Chief Minister Bhim Sen Sachar as its leader. After he resigned in 1956, Partap Singh Kairon became chief minister. Serving until 1964, Kairon remains one of Punjab's longest-serving chief ministers. He was followed by the returning Chief Minister Gopi Chand Bhargava, who briefly held office as acting chief minister for only 15 days. In July 1964, Ram Kishan assumed the office and served for two years. His tenure was followed by the President's rule which lasted for 119 days. On 1 November 1966, the state of Haryana was partitioned from Punjab and some other districts were given to the state of Himachal Pradesh.