Entry: testatory (adj.)
In context: "Certain other and doubtless really disturbing footage of Clipperton's suicide still exists, having - with perhaps a half a dozen other emotionally or professionally sensitive cartridge-Masters - been designated Unviewable by testatory codicil and, as far as either Hal or Orin knows, enclosed in some sort of vault-apparatus that only Himself's attorneys and maybe Avril have access to."
Definition: pertaining to or of the nature of evidence.
Other: Interestingly, this comes from testator (n.): One who makes a will; esp. one who has died leaving a will.
Testator can be traced back to testateur (Fr.) in 1306, but there is a long history to wills.
SNOOT score: 2
Source: Oxford English Dictionary