Rule 34: Even if a new victim's name, cause of [death, or conditions of death are written on top of the original victim's name, cause of death, or conditions of death, there will be no effect on the original victim's death. The same thing will also apply to erasing what was written with a pencil, or whiting out what was written with a pen.][10] Rule 63: [In the event that there are more than six Death Notes in the human world, only the first six Death Notes that have been delivered to humans will have effect. The seventh Death Note will not become active until one of] the other 6 Death Notes are [destroyed or a Shinigami] takes one of them back to the Shinigami realm.[11] Rule 64: Each page of the note contains the power of the whole note.[11] Rule 89: If the person who writes a name destroys its page prior to the death being carried out, the target will be spared.[12][13] Rule 90: Shinigami must own at least one personal Death Note which must never be lent to or written on by a human.[3] Rule 91: Shinigami may exchange and write in each other's Death Notes.[3] Rule 92: If a Shinigami decides to use a Death Note to end the life of the killer of an individual it favors, that individual's life will be extended but the Death Note will remain. The ownership of this Death Note is usually carried over to the next Shinigami that touches it, but it is common sense that it be returned to the Shinigami King.[3] Rule 93: By manipulating the death of a human who has influence over another human's life, that human's original life span can sometimes be lengthened. If a Shinigami intentionally does this the Shinigami will die but even if a human does the same, the human will not die.[3] Rule 94: A Shinigami cannot be killed even if stabbed or shot. However, there are ways to kill them which are not generally known even to the Shinigami themselves.[3] Rule 95: Anyone may write names in the note, but only the keeper can possess it for more than seven days.[14][3]
