Defining the term 'criminal organization' will be the challenge as charges against members of the Luminati gang move through the courts.

Nearly 140 drug-related and criminal organization charges were laid after a major bust that saw nineteen people arrested.

However, the charge for being a member of a criminal organization is a relatively new one.

Defence lawyer Craig Parry represents some of the accused and says "It's a pretty new animal."

Speaking in general, not directly about the current cases, Parry says "If you've got a couple of unsophisticated street level hoods who all agree to do something together, are they a criminal organization, or does it have to be something more sophisticated?"

Waterloo Regional Police became aware of the 12-member Luminati organization in 2008, and reportedly has ties to the Hell's Angels.

Hal Mattson is also a defence lawyer representing some of the accused, and says proving a suspect has committed a crime is much easier than proving there's a criminal organization at work.

He says, "That term really hasn't been defined by the court a hundred per cent."

Meanwhile those arrest during the massive sweep on Oct. 20 continue to make court appearances. Some have made bail while others must return for hearings next week.

Warrants are expected for two more suspects, and additional arrests may still be made.