Per google dictionary:
“dis·



·i·tive
dəˈspäzədiv/Submit
adjective
relating to or bringing about the settlement of an issue or the disposition of property.
"such litigation will rarely be dispositive of any question"
LAW
dealing with the disposition of property by deed or will.
"the testator had to make his signature after making the dispositive provisions"
dealing with the settling of international conflicts by an agreed disposition of disputed territories.
"a peace settlement in the nature of a dispositive treaty"”
—scratching head
(Dying without my emojis here...still need to figure that one out on the new platform)