cap 224 sec 99
1) there is no right of provate defence against an act which does
not reasonable cause the apprehension of death or of grievous hurt,
if done, or attempted to be done, by a pub;ic servant acting in
good faith under colour of his office, thought that act, may not be
strictly justifiable by law
2) there is no right of private defence against an act which does
not reasonably cause the apprehension of death or of grievous hurt,
if done, or attempted to be done by the direction of a public
servant acting in good faith under colour of his office, thought
that direction may not be strictly justifiable by law
3) there is no right of private defence in cases in which there is
time to have recourse to the protection of the public
authorities.
4) the right of private defence in no case extends to the
infliction of more harm than its necessaru to inflict for the
purpose of defence.