The pro-democracy party led by Aung San Suu Kyi has rejected allegations by Burma's military rulers that it has links to terrorist groups.
Aung San Suu Kyi remains under house arrest
A spokesman for the National League for Democracy (NLD) said the government must provide proof to back the claims.
Earlier Information Minister Brigadier General Kyaw Hsan said there was enough evidence to outlaw the NLD. However the authorities have not yet done so.
The NLD won elections in Burma in 1990, but was not allowed to take power.
"Provide us the proof. They have to show us the evidence that we have links with illegal organisations," NLD spokesman U Lwin said in the capital.
Burma's military junta has recently accused exile groups based in Thailand of carrying out a series of bomb attacks.
But dissident groups say the regime is fostering a climate of insecurity to shore up support at home.