law: 2. Notes bearing messages of a political character not to be legal tender.-
  Notwithstanding anything contained in the Reserve Bank of India Act, 1934 (2 of 1934), or in the Currency Ordinance, 1940 (Ord. 4 of 1940), or in any other law for the time being in force, a currency note of the Government of India, a bank note issued by the Reserve Bank of India, or a Government of India one-rupee note issued under the Currency Ordinance, 1940, which bears written upon it any extrinsic words or visible representations intended to convey or capable of conveying a message of a political character, shall not be legal tender; and the Reserve Bank of India shall not be under any legal obligation to receive any such note, or to issue rupee coin or other coin or currency notes or bank notes in exchange for any such note, or to refund the value of any such note: Provided that the Reserve Bank of India may refund as of grace the whole or part of the value of any such note.