I tried to find noncupative, but could not find any dictionary entry. Lots of noncupative wills referenced when I Googled the word, but the only helpful entry was under the Law of Succession of The People's Republic of China:

"A testator may, in an emergency situation, make a noncupative will, which shall be witnessed by two or more witnesses. When the situation is over and if the testator is able to make a will in writing or in the form of a sound-recording, the noncupative will he has made shall be invalidated."