This is about the death note rules:

I
The human whose name is written in this note shall die.
This note will not take effect unless the writer has the persons face in their mind when writing his/her name. Therefore, people sharing the same name will not be effected.
If the cause of death is written within 40 seconds of writing the persons name, it will happen.

If the cause of death is not specified, the person will simply die of a heart attack.

After writing the cause of death, details of the death should be written in the next 6 minutes and 40 seconds.

II
This note shall become the property of the human world, once it touches the ground of arrives in the world.
The owner of the note can recognize the image and voice of its original owner. I.e. a God of Death.
The human who uses this note can neither go to Heaven or Hell.

III
If the time of death is written within 40 seconds after writing the cause of death as a heart attack, the time of death can be manipulated, and the time can go into effect within 4 seconds after writing the name.

The human who touches the Death Note can recognize the image and voice of its original owner, a God of Death, even if the human is not the owner of the note.

IV
The person in possession of the Death Note is possessed by a God of Death, its original owner, until they die.

If a human uses the note, a God of Death usually appears in front of him/her within 39 days after he/she uses the note.

Gods of Death, the original owners of the Death Note, do not do, in principle, anything which will help or prevent the deaths in the note.
A God of Death has no obligation to completely explain how to use the note or rules which will apply to the human who owns it.

V
A God of Death can extend his life by putting human names in the note, but humans cannot.

A person can shorten his or her life by using the note.

The human who became the owner of the Death Note can, in exchange of half of his/her remaining life, get the eyeball of the God of Death which will enable him/her to see a human's name and remaining lifespan when looking through them.
A God of Death cannot be killed even if stabbed in his heart with a knife or shot in the head with a gun. However, there are ways to kill a God of Death, which are not generally known to the Gods of Death.

VI
The conditions for death will not be realized unless it is physically possible for that human or it is reasonably assumed to be carried out by that human.
The specific scope of the condition for death is not known to the God of Death, either. So, you must examine and find out.

VII
One page taken from the Death Note or even fragment of the page contains the full effects of the note.
The instrument to write with can be anything. E.g. cosmetics, blood, etc as long as it can write directly into the note and remain as legible letters.
Even the original owners of the Death Note, God of Death, do not know much about the note.


VIII
You may also write the cause and/or details of death prior to filling in the name of the individual. Be sure to insert the name in front of the written cause of death. You have about 19 days according to the human calendar in order to fill the name.
Even if you do not actually possess the Death Note, the effects will be the same if you can recognize the person and his/her name to place in the blank.

IX
The Death Note will not affect those under 780 days old.

The Death Note will be rendered useless if the victims name is misspelled f0ur times.

X
Suicide is a valid cause of death. Basically all humans are thought to possess the possibility to commit suicide. It is, therefore, not something unbelievable to think of.
Whether the cause of the individual's death is either a suicide or accident, if the death leads to the death of more than intended, the person will simply die of a heart attack. This is to ensure that other lives are not influenced.

XI
Even after the individual's name, the time of death, and death condition in the Death Note were filled, the time and condition of death can be altered as many times as you want, as long as it is changed within 6 minutes and 4 seconds from the time it was filled in. But, of course, this is only possible before the victim dies.
Whenever you want to change anything written in the Death Note within 6 minutes and 4 seconds after you wrote it, you must first rule out the characters you want to erase with two straight lines.
As you see above, the time and conditions of death can be changed, but once the victim's name has been written, the individual’s death can never be avoided.

XII
If you lose the Death Note or have it stolen, you will lose its ownership unless you retrieve it within 490 days.
If you have traded the eye power of a Death of God, you will lose the eye power as well as the memory of the Death Note once you lose the ownership. At the same time, the remaining half of your life will not be restored.

XIII
You may lend the Death Note to another person while maintaining its ownership. Subletting it to yet another person is possible, too.
The borrower of the Death Note will not be followed but the God of Death. The God of Death always remains with the owner of the Death Note. Also, the borrower cannot trade the eyesight of the God of Death.

XIV
When the owner of the Death Note dies while the note is being lent, its ownership will be transferred to the person who is holding it at the time.
If the Death Note is stolen and the owner is killed by the thief, its ownership will automatically be transferred to the thief.

XV
When the same name is written on more than two Death Notes, the note which was first filled in will take effect, regardless of the time of death.
If writing the same name on more than two Death Notes is complete within a .6 second difference, it is regarded as simultaneous, the Death Note will not take effect and the individual written will not die.

XVI
The God of Death must at least own one Death Note. That Death Note must never be lent to or written on by a human.
Exchanging and writing in the Death Note between the Gods of Death is no problem.

XVII
If the God of Death decides to use the Death Note to kill the assassin of an individual he favors, the individual’s life will be extended, but the God of Death will die.
The dead God of Death will disappear, but the Death Note will remain. The ownership of his Death Note is usually carried over to the next God of Death that touches it, but it is common sense that it is returned to the Great God of Death.

XVIII
Only by touching each other's Death Notes can human individuals who own the Death Note in the human world recognize the appearance or voice of each other's God of Death.
An individual with the eye power of God of Death can see the name and life span of the other human by looking at that person's face. By possessing the Death Note, an individual gains the ability to kill and stop being a victim. From the point, a person with the Death Note cannot see the life span of other Death Note owners, including him/her. But, it is not really necessary for the individual to view the life span of him/herself not the Death Note owners.
The God of Death must not tell humans the name or life span of individual he sees. This is to avoid confusion in the human world.

XIX
It is prerequisite for the Death Note used in the human world that a living God of Death makes sure that the human in the human in the human world use it.
It is very difficult to consider that a God of Death who has possessed a human could die, but it he should die, the Death Note that he brought into the human world will not lose it's power.

XX
In order to see the names and life span of humans by using the eye power of the God of Death, the owner must look at more than half of that person's face. When looking from top to bottom, he must look at least from head to the nose. If he looks at only the eyes and under, he will not be able to see the persons name and life span. Also, even though some parts of the face, for example the eyes, nose or mouth are hidden, if he can basically see the whole face, he will be able to see the person’s name and life span. It is still not clear how much exposure is needed to tell the name and life span, and this needs to be verified.

XXI
Those with the eye power of the God of Death will have the eyesight of over 3.6 in the human measurement, regardless of their original eyesight.

XXII
The individuals who lose the ownership of the Death Note will also lose their memory of the usage of the Death Note. This does not mean that he will lose all the memory from the day he owned it to the day he loses possession, but means he will only lose memory involving the Death Note.

XXIII
Whenever an individual with ownership of more than two Death Notes loses possession to one of the Death Notes, he will not be able to recognize that Death Notes God of Deaths appearance or voice anymore. The God of Death himself will leave, but all the memory involving that Death Note will remain as long as he maintains ownership of at least one another Death Note.

XXIV
The God of Death must not stay in the human world without a particular reason, conditions to stay in the human world as followed:
I. When the God of Deaths Death Note is handed to a human.
II. Essentially, finding a human to pass on the Death Note should be done from the world of the Gods of Death, but if it is within 82 hours this may also be done in the human world.
III. When the God of Death stalks an individual with an intention to kill them, as long as it is within 82 hours of haunting them., the God of Death may stay in the human world.

XXV
The God of Death must not hand the Death Note directly to a child under 6 years of age based on the human calendar.
The Death Note must not be handed to a child under 6 years of age, but Death Note that have been dropped into the human world, and are part of the human world, can be used upon humans of any age with the same effect.

XXVI
If you just write of accident for the cause of death, the victim will die from an unusual accident after 6 minutes and 40 second from the time of writing it.
Even though only one name is written in the Death Note, if it influences and causes other humans that are not written in it to die, the victims cause of death will be a heart attack.

XXVII
If you write “die of disease” with a specific disease name and the person’s time of death, there must be a sufficient amount of time for the disease to progress. If the set time is too tight, the victim with die of a heart attacks after 6 minutes and 4 seconds after completing the Death Note.
If you write “die of disease” for the cause of death, but only write a specific time of death without the actual name of disease, the human will from an adequate disease. But the Death Note can only operate within 23 days in the human world calendar. This is called 23 day rule.

XXVIII
If you write “die of disease” like before, with a specific disease name, but without a specific time, if it takes more than 24 days for the human to die, the 23 day rule will not take effect and the human will die at an adequate time depending on the disease.
When writing the cause and/or details of death it must be done within 6 minutes and 4 seconds. You cannot change the victims time of death however soon it may be.

XXIX
You cannot kill humans at the age of 124 and over with the Death Note.
You cannot kill humans with less than 12 of life left in human calendar.

XXX
If you have traded the eye power of God of Death, you will see a person’s primary life span in the human world.
The names you see with eye power of God of Death are names needed to kill that person. You will be able to see the names even if that person isn’t registered in the family registration.

XXXI
The number of pages of Death Note will never run out.

XXXII
If someone possesses more than one Death Note, by visualizing the victim, then writing down the name in one of the Death Notes and the cause of the death in the other, it will take effect. The order however, is unimportant, if you write down the cause of death in one Death Note and afterwards, write the name in the other, it will still take effect.
This can also be accomplished by two Death Notes owners working together. In this case it’s necessary that the two touch each others Death Notes.

XXXIII
If a person loses possession of a Death Note, they will not recognize the Gods of Death by sight or voice and more. If however, the owner lets someone else touch his Death Note from that time on, that person will recognize the God of Death.
In accordance with the above, the human who touched the Death Note and began to recognize the Gods of Deaths sight and voice, will continue to recognize it until that human actually owns the Death Note and subsequently loses possession of it.

XXXIV
The owner of the Death Note cannot be killed by a God of Death who is living in the world of Gods of Death.
Also, a God of Death who comes to the human world, in the objective to kill the owner of the Death Note will not be able to do so.
Only God of Death that passed on the Death Note to a human is able to kill the owner of the Death Note.

XXXV
If a Death Note owner accidentally misspells a name 4 times, that person will be free from being killed by the Death Note. However, if they intentionally misspelled the name 4 times, the Death Note owner will die.
The person whose name was misspelled 4 times on purpose will not be free of death by a Death Note.

XXXVI
There are male and female Gods of Death, but it is neither permitted, not possible for them to have sexual relations with humans. The Gods of Death also cannot have sex with each other.

XXXVII
When regaining ownership of the Death Note, the memories associated with the Death Note will also return. In cases when you were involved with other Death Note as well, memories of all the Death Note involved will return.
Even without obtaining ownership, memories will return just by touching the Death Note.

XXXVIII
You lose memory of Death Note when losing its ownership. But you can regain this memory by either obtaining the ownership once again, or by touching the Death Note. This can be done up to 6 times.
If the 6 times are exceeded, the person’s memory of Death Note will not return and they will have to use it without any previous memory of it.

XXXIX
Humans that have traded for the eye power of a God of Death cannot see the name or life span of humans who have passed away by looking at their photos.

XL
Whenever a God of Death who had been in the human world dies, the Death Note is left behind and is picked up by a human, the person becomes the owner.
However, in this case, only the human that can recognize the God of Death and it’s voice is able to see and touch the Death Note.
It is very unlikely, but if by any chance a God of Death picks up the Death Note, then that God of Death becomes the owner.

XLI
It is useless to erase names written in the Death Note with eraser or whiteout.

XLII
The use of Death Note in the human world sometimes affects other human lives to shorten their original life span, even though their names are not actually written in the Death Note itself. In these cases, no matter the cause, the God of Death sees only the original lifespan and not the shortened lifespan.

XLIII
If a Death Note is owned in the human world against the God of Deaths will, that God of Death is permitted to stay in the human world in order to retrieve it.
In that case, if there are other Death Notes in the human world, the Gods of Death are not allowed to reveal to humans the Death Notes owner or its location.

XLIV
If the Death Note that the God of Death owns is taken away by being cheated by other Gods of Death and so forth, it can only be retrieved from the God of Death who possesses it at the time. If there is no God of Death, but human possessing it, the only way that the God of Death can retrieve it will be to first touch the Death Note and become the God of Death that haunts that human. Then wait until that human dies to take it away before any other human touches it or whenever the human shows a will to let go of it.

XLV
As long as the God of Death has at least once seen a human and knows his/her name and lifespan, the God of Death is capable of finding that human form hole in the Death Note world of the God’s of Death.

XLVI
There are laws in the world of God’s of Death. If a God of Death should break the law, there are 9 levels of severity starting at level 8 and going up to lever 1. Plus the extreme lever. For severity levels above 3 the God of Death will be killed after being punished.
For example, killing a human without using the Death Note is considered as the extreme level.

XLVII
Losing the memory of the Death Note be passing on the ownership to another, or by abandoning its ownership will only occur when someone is actually killed using that Death Note. You will not lose memory of the Death Note, for example, if you merely owned it and not written anyone’s name. In this case, you will not be able to hear the voice or see the figure of the God of Death any more. You will also lose the eye power of the God of Death you traded with.

XLVIII
The God of Death will not die from lack of sleep. Moreover, Gods of Death do not really need sleep. The meaning of sleep for Gods of Death is essentially different from humans and merely laziness.
Especially, Gods of Death living in the human world that have passed on their Death Note shouldn’t be lazy, as they are required to see the Death Note of the human, but it is not that they are not allowed to sleep.

XLIX
Only 6 Death Notes are allowed to exist at a time in the human world. Of course, the Death Note that the God of Death owns does not count. This means only 6 Gods of Death that have passed on their Death Note to humans can stay in the human world.

L
One God of Death is allowed to pass on Death Notes to only 3 humans at a time.
It is possible for a single God of Death to hand out up to 6 Death Notes, for example, by handing 6 humans 6 Death Notes each.
In other words, one human could own all 6 Death Notes.

LI
However, if a seventh Death Note is owned by a human in the human world, nothing will happen even if used.

LII
In the event that there are more than 6 Death Notes in the human world, only the first 6 Death Notes that have been delivered to humans will have effects.
The seventh Death Note will not become active until one of the other 6 Death Notes is burned, or a God of Death takes it one of them back to the world of Gods of Death.

LIII
The Death Note will not take effect if you write a specific victims name using several different pages.
But the front and back of a page is considered as one page. For example, the Death Note will still take effect even if you write the victims name on the front page and given name on the back.

LIV
In order to make the Death Note take effect, the victims name must be written on the same page, but the cause of death and the situation around the death can be described on other pages of the Death Note. This will work as long as the person that writes in the Death Note keeps the specific victims name in mind when writing the cause and situation of the death.

LV
In occasion where the cause and situation of death is written before the victim’s name, multiple names can be written as long as they are written within 4 seconds and the causes and situation of the death are no impossible to occur.
In the occasion where the cause of death is possible but the situation is not, only the cause of death will take effect for that victim. If both the cause and the situation are impossible, that victim will die of heart attack.

LVI
When you write multiple names in the Death Note and then write down even one cause of death within 4 humans second from writing the fist victims name, the cause will take effect for all the written names.
Also, after writing the cause of death, even if the situation of death is written within 6 minutes and 40 seconds in the human world, that situation will only occur to the victim whom is possible. For those where the situation is not possible, only the cause of death will occur.

LVII
In the Death Note you cannot set death date longer that the victims original life span, even if the victims death is set in the Death Note beyond his/her life span. The victim will die before the set time.

LVIII
By manipulating the death of a human that has influence over another human’s life, that human original life span can sometimes be lengthened.
If a God of Death intentionally does the above manipulation to effectively lengthen a human’s life span, the God of Death will die, but even if a human does the same, the human will not die.

LIX
A human death caused by the Death Note will indirectly lengthen some other human’s original length of life even without a specific intention to lengthen a particular persons original life span in the human world.