every organ of the State must act within the limits of its power and carry out the duty imposed upon it by the Constitution or the law
S.P. Gupta vs President Of India And Ors. on 30 December, 1981Indian Kanoon - http://indiankanoon.org/doc/1294854/ 16Supreme Court of IndiaS.P. Gupta vs President Of India And Ors. on 30 December, 198...