Twenty-second Amendment to the United States Constitution
The amendment prohibits any individual who has been elected president twice from being elected again. Under the amendment, an individual who fills an unexpired presidential term lasting greater than two years is also prohibited from winning election as president more than once. Scholars debate whether the amendment prohibits affected individuals from succeeding to the presidency under any circumstances or whether it only applies to presidential elections.
President's rule
In practice, president's rule has been imposed under different circumstances:If approved by both houses, President's Rule can continue for 6 months. It can be extended for a maximum of 3 years with the approval of the Parliament done every 6 months. If the Lok Sabha is dissolved during this time, the rule is valid for 30 days from the first sitting of the Lok Sabha provided that this continuance has already been approved by Rajya Sabha. The 44th Amendment Act of 1978 introduced a new provision to put a restraint on the power of the Parliament to extend President's rule in a state. According to this provision, President's rule can only be extended over a year every 6 months under following conditions:
President's rule can be revoked at any time by the President and does not need the Parliament's approval.