Hrangkhawl who was representing the Karamcherra seat in the Dhalai District of Tripura was a four-time MLA.
While Opposition MLAs in other states are dumping their parties to join the Bharatiya Janata Party, Tripura is seeing a reverse trend.
The delegation led by Forest minister Mevar Kumar Jamatia, who is also the general secretary of IPFT met Shah on Thursday and submitted a five-point memorandum.
Governor Tathagata Roy also administered the oath of office to BJP leader Jishnu Deb Burman as the deputy chief minister along with seven other ministers, including Indigenous People's Front of Tripura chief N C Debbarma.
The venue holds significance as the announcement of Nagaland's statehood on December 1, 1963 was made from Kohima by the then president Sarvepalli Radhakrishnan.