The coalition ministry headed by N. Biren Singh will be facing the floor test in Manipur Assembly on Monday.
The 60-elected members of the assembly had taken oath on Sunday.
Earlier, Governor Najma Heptullah appointed V. Hangkhalian the pro-tem Speaker and administered the oath in a simple function at the Raj Bhavan.
Most elected Bharatiya Janata Party (BJP) members returned to Imphal on Saturday evening from Guwahati.
The strength of the Congress in the house went down to 27 from its original 28. A Congress legislator, T. Shyamkumar, had joined the cabinet.
(with IANS inputs)