The general secretary of Fiji's National Federation Party says the new decree on political parties is unworkable for existing parties.
The elections minister, Aiyaz Sayed-Khaiyum, has announced, but not publicly released, the new decree, which will give existing parties 28 days to re-register under the new terms.
Parties also have to have 5,000 signed-up members across the country's four divisions, up from the current 180, and union officials, among others, will not be allowed to form parties.
Pramod Rae says recruiting 5,000 members in 28 days is impossible.
"I don't think any of the political parties are in a position to meet that given the recent restrictions on party activity and the current scenario. So, we look at the whole thing from the view that it's sinister, that the government here has sinister motives to completely annihilate existing political parties."
Pramod Rae says he believes the restriction on union membership is aimed specifically at his party.
The regime has not responded to requests for comment from Radio New Zealand International.