decretive

from The Collaborative International Dictionary of English v.0.48

Decretive \De*cre"tive\, a. [From L. decretum. See {Decree}, n.]
   Having the force of a decree; determining.
   [1913 Webster]

         The will of God is either decretive or perceptive.
                                                  --Bates.
   [1913 Webster]