The last legislative polls was held in 2013 for five-year terms.
President Paul Biya who was re-elected in 2018 has twice postponed the elections.
Opposition leader Maurice Kamto was imprisoned along with some of his supporters for denouncing electoral fraud through marches.
Since his release in October, Kamto’s attempts to hold public meetings have not been approved by authorities.
His Movement for the Renaissance of Cameroon has said the party had requested certain preconditions be met, like a revision of the electoral code.
The main opposition party in Parliament , the Social Democratic Front failed to comment on its participation in the 2020 legislative polls when reached by AFP.