The Tamil National Alliance (TNA) says it is ready to discuss the proposals put forward by the UNP for a new constitution.
TNA MP M.A. Sumanthiran said that the proposal put forward by the UNP is only a structure and not a final document.
He said that as the proposal is open for discussion in order to have a final document the TNA is willing to have discussions with the UNP.
The main opposition UNP had last week made public its proposed constitution which includes a British style Westminster system for the Cabinet.
The UNP constitution also proposes as a novel system the executive powers of the President to be exercised on apolitical basis and to be subject to checks and balances.
Under the Westminster system the Cabinet of Ministers will be restricted to 25 including the Prime Minister.
The proposed constitution of the UNP also guarantees the freedom of expression and will be strengthened to include the right to information.
It also proposes that the system of preference votes be abolished and the tenure of the Parliament and the Provincial Council fixed at five years.