Kabila officially ended his term in office in December, but he was allowed to stay in exchange for guarantees that elections will be held.
The delay could be reduced "if we accept to use voting machines and if we change the electoral law," a commission spokesman told AFP.
Following a meeting of the UN Security Council in New York, French Ambassador Francois Delattre called on Kinshasa to quickly release a full timetable for what he said must be "credible" elections.
The Security Council called for elections to be organised this year in the DR Congo, in line with a political agreement reached between the government and opposition groups.
But diplomats privately acknowledged that holding polls in the vast African country in the coming three months would not be possible due to logistical hurdles.
Diplomats said they did not consider the latest statement from the electoral commission as a formal timetable, which they stressed must contain specific dates for the vote.
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