Establish Judicial Review.
Great Britain has neither Separation of Executive and Legislative Powers or Judicial Review.
Judicial Review
judicial review
The judicial power to decide whether a law is constitutional.
Marshall used the case of Marbury v. Madison to establish the principle of judicial review, the authority of the Supreme Court to strike down unconstitutional laws. Today, judicial review remains one of the most important powers of the Supreme Court.
I do not know who said that but if you are wondering what it refers to, that would be a judicial review.
That power is the power of judicial review.
Judicial Review
Judicial review... which was given binding authority by Maybury v Madison in 1803
judicial review
A judicial review allows the Supreme Court to annul any acts of the state that is deemed to be unconstitutional. This decision was made during the Marbury v. Madison case which stated that they have the right to review the acts of Congress to determine its constitutionality.