term:

Law Of The Case

law of the case

:a doctrine in legal procedure: an issue esp. of law that has been decided (as by an appeals court) will not be reconsidered in the same case unless compelling circumstances warrant such reconsideration
;also
: a matter of law considered as settled in a case [the jury instructions were not objected to and thus became the law of the case]

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.