[At this point, a State enacting a new Penal Code may insert additional Articles dealing with special topics such as narcotics, alcoholic beverages, gambling and offenses against tax and trade laws.  The Model Penal Code project did not extend to these, partly because a higher priority on limited time and resources was accorded to branches of the penal law which have not received close legislative scrutiny.  Also, in legislation dealing with narcotics, liquor, tax evasion, and the like, penal provisions have been so intermingled with regulatory and procedural provisions that the task of segregating one group from the other presents special difficulty for model legislation.]