How has this rule been modified over time?
The rule has been modified over time through various amendments to the Constitution. It was first inserted by the Constitution (Thirty-eighth Amendment) Act, 1975, with retrospective effect and then later substituted by the Constitution (Forty-fourth Amendment) Act, 1978, with effect from June 20, 1979. The rule was omitted by the Constitution (Sixty-third Amendment) Act, 1989, and then reinserted by the Constitution (Sixty-fourth Amendment) Act, 1990, with effect from April 16, 1990.