Two bills that lay down the mechanism to hold simultaneous elections were introduced in the Lok Sabha was sent to Joint Parliamentary Committee (JPC) for wider considerations and debates. The Constitution (129th Amendment) Bill was introduced in the Lok Sabha by Meghwal after a nearly 90-minute debate, followed by a division of votes. As many as 269 members voted in favour of the Bill and 198 against it.

Home Minister Amit Shah said Prime Minister Narendra Modi favoured detailed discussion at every level on the 'one nation, one election' bill and wanted it to be referred to a Joint Committee of Parliament. "When One Nation, One Election bills came up in Cabinet, PM Modi said these should be referred to the Joint Committee of Parliament. There should be a detailed discussion over it at every level," Shah said.

Shah said the bill can be discussed in greater detail in the Joint Committee of Parliament. The report of the JPC will be approved by the Union Cabinet and the Bill can be discussed again in Parliament, he said.

The Constitution (129th Amendment) Bill was introduced in Lok Sabha following a division of votes. The Union Territories Amendment Bill seeks to align the elections to the union territories Puducherry, Delhi and Jammu & Kashmir with the Lok Sabha polls. Union Law Minister Arjun Meghwal also introduced The Union Territories Amendment Bill, which seeks to align elections in the Union territories of Puducherry, Delhi, and Jammu and Kashmir with the Lok Sabha polls. He said the proposed bills did not attack the "basic structure doctrine, as claimed by the opposition".

Principles such as judicial review, federal character of the Constitution, separation of powers, secular character, supremacy of the Constitution had not changed, Meghwal said, adding that the objections to the Bill were political in nature.                 Congress member Manish Tewari opposed the introduction of the bills and termed the move an assault on the basic structure doctrine that stipulates certain features of the Constitution are beyond the amending power of Parliament.

"One of the essential features is federalism and the structure of our democracy. The bills assault the basic structure of the Constitution and exceed the legislative competence of this House," Tewari, a former Union minister, said. Samajwadi Party member Dharmendra Yadav said the measure to introduce "one nation, one election" by the BJP was an attempt to bring dictatorship in the country.

Meghwal said he would move a resolution referring the Bills to a joint committee of Parliament. Earlier,Trinamool Congress member Kalyan Banerjee said the bills linked the tenure of state assemblies to that of the Lok Sabha, thus undermining the mandate of the people. "The state government is not subordinate to the central government or Parliament. The bills take away the autonomy of the state assembly. It is not an election reform but just the fulfilment of one gentleman's desire and dream," he said.

DMK member TR Baalu said, "The electors have the right to elect the government for five years and this right cannot be curtailed with simultaneous elections." The opposition members also objected to Speaker Om Birla's move to call the treasury benches to speak on the bills, leading to a heated debate.

Parliamentary Affairs Minister Kiren Rijiju said the speaker had given a ruling to allow floor leaders of all parties to speak on the introduction of the bills.        "You alone do not represent Parliament, every political party has a representation here," Rijiju said. BJP allies the Telugu Desam Party (TDP) and the Shiv Sena extended "unwavering support" to the election reform measure. TDP member and Union minister Chandra Shekhar Pemmasani said "one nation, one election" would reduce expenditure on polls and enhance logistical efficiency.

Shiv Sena member Shrikant Shinde hit out at the opposition, saying they were allergic to reforms. The DMK's Baalu and NCP (Sharadchandra Pawar) member Supriya Sule favoured referring the bills to a parliamentary committee, if they could not be withdrawn. "This Bill is aimed at maximising political gain and convenience. This Bill will finish off regional parties," All India Majlis-e-Ittehadul Muslimeen (AIMIM) leader Asaduddin Owaisi said.