The Senate gave preliminary approval to House Bill 69 on Wednesday.
Last month the Wyoming Supreme Court ruled that people who legally obtain medical marijuana in other states are not exempt from criminal prosecution for drug possession in Wyoming.
The case involved a Colorado man, Daniel J. Burns of Boulder, who was arrested in March 2009 in Laramie County after marijuana was found in his vehicle. He has a Colorado medical marijuana registry card and doctor's recommendation to use the drug but was charged in Wyoming.
Colorado is one of 16 states and the District of Columbia that allow medical marijuana use or make special concessions on penalties for marijuana users with a medical condition.
(Copyright 2011 by The Associated Press. All Rights Reserved.)