The Papua New Guinea Opposition says Tuesday's parliament sitting made a mockery of the institution.
Last Friday the Opposition Leader, Belden Namah, called for an adjournment, and on the vote it was decided to convene again at the end of this month.
But the Speaker, Job Pomat, went public on Monday, saying Namah had no right to call for the vote and that parliament was still in session.
Belden Namah Photo: Al Smith
Then on Tuesday 50 government MPs met, passed the Budget, and adjourned until April next year, in order to evade a vote of no confidence in the government of James Marape.
Namah said, in a statement, the sitting was illegal because members of the Opposition were not properly informed, and the matter would be challenged in the Supreme Court.
He claimed all actions and proceedings of Parliament, such as the passing of the 2021 Budget were invalid.
Namah warned people to be wary of implementing the measure.
He wanted to know how MPs could pass the Budget without the Opposition having a say.
The Opposition Leader said the haste in passing the measure was an insult to the country and had not been certified by the Solicitor General and the First Legislative Council.
NBC reported Marape saying the Opposition Leader had hijacked the parliamentary process when he adjourned the institution last week.