According to the pre-Revolution laws, to realize participation in a crime, the participation or involvement of two (or more) persons in executing acts constituting a crime was sufficient. After the Revolution, however, such crimes should depend on acts carried out by all of them. [The rule of] dependence may restrict cases of participation in that one who has played a role in aiding and abetting the crime is not a partner in crime, since the crime does not depend on him. But, does dependence increase cases of participation? In other words, may one who has played no role in aiding and abetting a crime be regarded as a partner in crime since the crime depends on him?The author is of the opinion that although, according to the existing laws, the reply is negative, for all crimes, according to the juridical (fiqhi) and legal rules, this particular condition of crimes requires hadd (punishment), qisas (retaliation), or diyah (blood-money). Thus, in preventive punishments (in certain cases such as when the crime committed is an organized one or it is committed by a gang), the legislator can regard those who have not performed executive operations of the crime as partners in crime, and in this way, he may hinder their abuses.