term:

Stipulation

stipulation n

1 : an act of stipulating
2 : something stipulated: as
a : an agreement between parties regarding some aspect of a legal proceeding [a of facts] [admitted the charges in a prehearing "New York Law Journal"]
b : a condition, requirement, or item specified in a legal instrument
;specif
: stipulation pour autrui

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