GENERAL PART
Aim of the Criminal Code
Chapter II
The Act of Crime and the Perpetrator
Title II
Attempt and Preparation
Section 18
(2) That person shall not be punishable for preparation
a) due to the voluntary desisting of whom the commencement of the perpetration of the crime does not take place ;
b) who withdraws his invitation, offer, undertaking with the aim of the prevention of the perpetration, or makes efforts so that the other contributors desist from the perpetration, provided that the commencement of the perpetration does not take place for any reason whatsoever ;
c) who informs the authority about the preparation.
EDIT.