As more states legalize recreational marijuana, there’s at least one place where the rules haven’t changed: the military. Active service members are strictly forbidden to use marijuana, whether it’s recreational or medicinal.

Standing in a rec center at Fort Carson, Col. is a doorframe-sized poster headlined, “The Costs of Marijuana.” Through charts and graphics, it lists the Army’s perspective on pot’s physical costs, social costs and usage trends.

“It emphasizes the fact that marijuana still continues to be the drug of choice in all of our services,” said Donna Clouse, prevention services branch chief for the Army’s Substance Abuse Program.

Her group created the poster, which is displayed at bases around the country. The poster also includes a color-coded map of the U.S., showing where marijuana is legal recreationally or medically.

Colorado, the home of Fort Carson, is colored white on the map, reflecting the fact that the state legalized recreational marijuana five years ago. But under the map is a large warning for service members: “Marijuana is still considered a Schedule 1 Drug.” [Read more at Texas Public Radio]