Prime Minister-designate Narendra Modi is set to take oath on Sunday for a third straight term, equalling the feat of first prime minister Jawaharlal Nehru, amid hectic parleys involving BJP leadership and allies over the share of berths of different constituents of the National Democratic Alliance in the new government.

Senior BJP leaders such as Union ministers Amit Shah and Rajnath Singh besides party president J P Nadda have been consulting the allies, including Telugu Desam Party's N Chandrababu Naidu, JD(U)'s Nitish Kumar and Shiv Sena's Eknath Shinde, to finalise their share of representation in the government.