<Li> Executes and enforces orders of the court through federal law enforcement . </Li> <Dl> <Dt> Judicial </Dt> </Dl> <Ul> <Li> Determines which laws Congress intended to apply to any given case </Li> <Li> Determines whether a law is unconstitutional . (The power of judicial review is not expressly granted in the Constitution, but was held by the judiciary to be implicit in the constitutional structure in Marbury v. Madison (1803).) </Li> <Li> Determines how Congress meant the law to apply to disputes </Li> <Li> Determines how a law acts to determine the disposition of prisoners </Li> <Li> Determines how a law acts to compel testimony and the production of evidence </Li> <Li> Determines how laws should be interpreted to assure uniform policies in a top - down fashion via the appeals process, but gives discretion in individual cases to low - level judges . (The amount of discretion depends upon the standard of review, determined by the type of case in question .) </Li> <Li> Polices its own members </Li> </Ul> <Li> Determines which laws Congress intended to apply to any given case </Li>

How does the principle of separation of powers work