Chapter II. General Conditions for Imposition of Penalties.
Art. 19
If the criminality of an act, or an increased penalty on account of an offence, is in this Act made subject to the condition that certain consequences result from its commission, that condition shall not be deemed fulfilled unless the consequences are at least ascribed to the defendant's negligence or deemed to have resulted from the defendant's failure to avert as far as possible the danger caused by the act, immediately when the defendant became aware of it.
EDIT.