In the U.S. the venue, performers, and promoters of an event where testing is performed are presumed guilty of distribution of illegal substances and subject to

In the U.S. the venue, performers, and promoters of an event where testing is performed are presumed guilty of distribution of illegal substances and subject to a civil penalty of at least $250,000 and up to 2x their gross receipts (income) for the event. Thankfully the official policy of the U.S. Department of Justice has been to not enforce this law since 2018, largely due to the Opioid Epidemic becoming a top public health crisis.