Aung San Suu Kyi's National League for Democracy on Tuesday urged the military government to create a "fair political climate," after the regime announced a constitutional referendum for May.
The party did not directly mention the junta's plans for a referendum, which is meant to clear the way for elections in 2010, but repeated its long-standing call for a dialogue with the junta.
"The (junta) has the main responsibility to realise national reconciliation, which is essential for the country," the party said in a statement, read out by senior member Than Tun.
"Moreover, it also has the responsibility to create a fair political climate and environment," the statement added.
The party also repeated its call for the release of Aung San Suu Kyi, who has spent 12 of the last 18 years under house arrest, as well as her deputy Tin Oo and 1,800 other political prisoners.
Tin Oo is also under house arrest, and the military is expected to announce an extension of his confinement this week.