The Cabinet decision came nearly two months after the Central Information Commission's order of bringing six national political parties--Congress, BJP, NCP, CPI-M, CPI and BSP--under the RTI Act.
The decision to amend the RTI Act was taken during a Cabinet meeting chaired by Prime Minister Manmohan Singh here, official sources said.
The amendments state that declaring political parties as public authorities under the RTI would "hamper their smooth internal functioning since it will encourage political rivals to file RTI applications with malicious intentions".
Under Section 2 of the RTI Act, the definition of public authority in the proposed amendment will make it clear that "it shall not include any political party registered under the Representation of the Peoples Act", the sources said.
As proposed earlier, political parties may not be added in the list of organisations (Section 8) exempted from parting information under the information act.
During the Cabinet meeting, some members including Petroleum and Natural Gas minister Veerapa Moily were of the opinion that the people should know that amending the law was not an unilateral move by the Government but was based on consensus among all political parties, they said.