Outgoing CM Sarbananda Sonowal proposed the name of the NEDA chief as leader of BJP Legislature Party at the legislature party meeting held in Guwahati on Sunday.
All schools in Assam will reopen from January 1, the government announced on Monday.
The death toll now stood at 1,002 and the fatality rate is 0.46 per cent.
Assam on Friday recorded 149 new COVID-19 cases, pushing the state's total tally to 2,12,320.
A total of 1,904 patients were discharged on Thursday.
Any person who had previously tested COVID-19 positive and subsequently tested negative need not undergo COVID-19 test if a negative test report can be produced during their arrival in Assam.
As many as 1,862 more people tested positive for the disease on Friday, Health Minister Himanta Biswa Sarma said.
Five more COVID-19 patients succumbed to the infection on Friday.
National People's Party chief Conrad Sangma has said that the four NPP legislators will continue in the Manipur government as ministers
One more patient was reported dead due to COVID-19 at the Gauhati Medical College, Assam on Saturday.
Madhav who is the party in charge of the Northeast states arrived in Imphal on Wednesday and felicitated the newly elected Rajya Sabha MP Leishemba Sanajaoba - the titular King of Manipur.
According to a highly reliable source from NPP, Sangma had a close-door meeting with four of his MLAs, who had recently walked out from the BJP-led coalition government.
The number of COVID-19 active cases in Assam stood at 1,928 on Saturday.
The number of active COVID-19 cases in Assam have gone down to 1,915 on Tuesday.
Assam now has 2,061 active COVID-19 cases.
Health Minister Himanta Biswa Sarma said with 208 new cases, the total number of COVID-19 positive cases in the state surged to 2,681 on Sunday.
Of the total 2,243 COVID-19 positive cases, four patients have succumbed to the virus while three have migrated to other states, official sources said..
A doctor who was present with the Assam health minister at a hospital in Kamrup during a routine visit was tested positive for COVID-19.
A total of 277 COVID-19 patients have so far been discharged from hospitals in Assam.
Of the new cases, Charaideo reported four cases while Sivsagar and Nagaon reported one case each, official sources said.
Total COVID-19 cases in the state climbed to 1,339 while the number of discharged cases stood at 185.