NEW DELHI: Parliament on Thursday passed the constitutional amendment bill regarding the land boundary agreement with Bangladesh, with the Lok Sabha's unanimous nod to the legislation. The Lower House, showing rare unanimity, passed the Constitution (119th Amendment) Bill to allow the operationalisation of the 1974 India-Bangladesh Land Boundary agreement.All the 331 members present in the House voted for the bill which became the 100th Constitutional amendment passed by Parliament."Historic milestone in India-Bangladesh relations," Prime Minister Modi tweeted after the Lok Sabha's nod. ​Modi also thanked opposition parties, including Sonia Gandhi for support to the bill and spoke to his counterpart Bangladesh PM Sheikh Hasina over the issue.The bill was unanimously passed by the Rajya Sabha on Wednesday when members buried their sharp ideological divide - from Shiv Sena to CPM - to unanimously give effect to the Land Boundary Agreement signed between India and Bangladesh in 1974 for exchange of enclaves.External affairs minister Sushma Swaraj won the hearts of the entire opposition on Wednesday by crediting Manmohan Singh government for putting in the hard work. "Manmohan Singh is the one who started the whole thing. I have merely completed the task," she said, thanking the former PM who was present in the Rajya Sabha. She pointed out that the bill is exactly the same - to the last comma and full stop - as was presented by UPA in Parliament in December 2013. "It's a win-win-win situation for everyone," she said, ascribing the quote to leader of opposition Ghulam Nabi Azad. Calling the passage of the bill "historic", Swaraj said it would take India-Bangladesh relations to a new high by settling the 41-year border issue.The bill aims at giving effect to the acquiring of territories by India and transfer of territories to Bangladesh through retaining of adverse possession and exchange of enclaves in accordance with the 1974 agreement.Sushma Swaraj said it was beneficial for both the countries and that there will a "notional" loss of territory without borders getting contracted.India will get 510 acres while Bangladesh will get 10,000 acres. "But these are notional figures as these areas are deep inside territories of the two countries. Our borders are not getting contracted," she said, while responding to members' questions whether India will lose some territory.Swaraj said the measure, apart from demarcating the boundaries, would also help checking illegal immigration."A solution to the problem of illegal immigration is inherent in this legislation. With the land border now being decided (with the passage of the bill), the portions where there is no fencing will also get fenced," she said.Swaraj said the only issue which remained to be settled with Bangladesh was that of river water-sharing, primarily relating to Teesta river. "The way in which we are now settling the land boundary issue, we will try to settle this issue also."She also announced a package of Rs 3,008 crore to West Bengal for rehabilitation Indian nationals who will come from Bangladesh, with their numbers estimated to go up to 30,000.Of this amount, Rs 775 crore is for expenses on fixed infrastructure and the remaining amount would be for variable expenses, depending upon how many people are to be rehabilitated by the state government.The maritime boundary between India and Bangladesh has also been settled last year with the award by the international tribunal.(Inputs from PTI)