Pot may be legal in the state of Colorado but don’t bring your stash to Denver International Airport. This week, DIA established an airport-wide marijuana ban and set fines for those attempting to fly with weed.

Travelers who are caught with pot face a fine of up to $150 for their first offense. A second offense could result in a $500 fine. If you’re caught again after that, you could face up to $999 in fines.

Airport spokeswoman Stacey Stegman says that DIA is simply attempting to get travelers to comply with federal law. “You cannot bring marijuana past security and you cannot transport it across state lines.” If a TSA agent “discovers marijuana, they would notify law enforcement. Law enforcement would look at the circumstances and determine what to do – depending upon intent, age, quantity, etc.”

However, Stegman emphasized that “other options would be explored before a citation would be given.” Meaning that adults over 21 caught with a small amount of pot would likely be asked to throw it away or leave it in their car. And if they refuse, they would be asked to leave the airport.

While some marijuana advocates are protesting the ban, Amendment 64 states that any “entity who occupies, owns or controls a property" can ban "the possession, consumption, use, display, transfer, distribution, sale, transportation, or growing of marijuana on or in that property.”

Speaking for the National Organization for the Reform of Marijuana Laws, Rachel Gillette stated, “To deny safe access to medical marijuana at the airport is unnecessary, and I think it’s cruel.”