Explanation:

On 23 April 1966, acting on the recommendation of the Hukam Singh Committee, the Indian government under Indira Gandhi set up the Shah Commission under the chairmanship of Justice J. C. Shah, to divide and set up the boundaries of Punjab and Haryana.As a result of this Punjab reorganization Act was passed in 1966.

The commission gave its report on 31 May 1966. According to this report the then districts of Hissar, Mahendragarh, Gurgaon, Rohtak, and Karnal were to be a part of the new state of Haryana. Further the Tehsils of Jind (district Sangrur), Narwana (district Sangrur) Naraingarh, Ambala and Jagadhari of district Ambala were also included. The commission recommended that Tehsil Kharar (including Chandigarh) should also be a part of Haryana.

The Shah committee in this report dated 18th March 1966, recommended the creation of Punjabi Suba. The Boundary Commission Report dated 31st May 1966 favored the inclusion of Chandigarh in Punjab. On 9th June 1966, the Government of India, after carefully considering the recommendation of the Dar Commission decided to 1) Make Chandigarh Union Territory; 2) Chandigarh to be the joint capital of Punjab and Haryana 3) Punjabi Suba and Haryana to be formed as separate states. Punjabi Suba retained its old name Punjab. The Siks were happy, the Hindu-speaking people revolted and there were riots.