The 9.31 Controlled Substance-Maintaining Drug-Involved Premises is a criminal offense in which an individual maintains, rents, leases, owns, or otherwise makes available a premise for the purpose of unlawfully manufacturing, storing, distributing, or using a controlled substance. This offense is typically punished as a felony. Types of 9.31 Controlled Substance-Maintaining Drug-Involved Premises include: drug-trafficking premises, drug-manufacturing premises, drug-using premises, and drug-distribution premises.