The Fiji Labour Party says Aiyaz Sayed Khaiyum should resign as Minister for Elections now he has been appointed as secretary general of the proposed political party headed by the regime leader.
Mr Sayed-Khaiyum, who is also the attorney general, was one of the officials revealed in the line-up on Monday when Rear Admiral Frank Bainimarama applied for registration of his Fiji First party.
Earlier this year, the Minister for Elections bought the Fiji First internet domain name - months before the regime leader announced the party name.
The Labour Party leader Mahendra Chaudhry says Mr Sayed-Khaiyum should step down as Minister for Elections immediately.
"There's a clear case of conflict now and if he continues in that office that will be abuse of office and there must be complete transparency insofar as the conduct of elections are concerned, in fact he should have resigned yesterday."
The Labour Party will meet later this week to discuss the party's leadership following last week's sentencing of Mr Chaudhry, which ruled him out of contention for this year's election.
Mr Chaudhry has lodged an appeal after being found guilty of breaching the Exchange Control Act.