89. Act done in good faith for benefit of child or insane person, by or by consent of guardian

Nothing which is done in good faith for the benefit of a person under the age of 12 years or of unsound mind, by or by consent, either express or implied, of the guardian or other person having l a f i l charge of that person, is an offence by reason of any harm which it may cause, or be intended by the doer to cause, or be known by the doer to be likely to cause, to that person:

Provided that this exception does not extend to -

the intentional causing of death or to the attempting to cause death;

the doing of anything which the person doing it knows to be likely to cause death, for any purpose other than the preventing of death or grievous hurt, or the curing of any grievous disease or infirmity;

the voluntary causing of grievous hurt, or to the attempting to cause grievous hurt, unless it be for the purpose of preventing death or grievous hurt, or the curing of any grievous disease or infirmity;

the abetment of any offence, to the committing of which offence it would not extend.

the consent is given by a person under fear of injury or under a misconception of fact; and

the person doing the act knows, or has reason to believe, that -

the consent was given in consequence of such fear or misconception;