Colorado’s tourists would be able to buy as much marijuana as residents if a bill moving through the legislature passes.

The measure repeals Colorado’s unique-in-the-nation tiered purchasing system for marijuana. All adults over 21 are allowed to possess an ounce of marijuana — but retail pot shops can’t sell more than a quarter-ounce in one day to people without Colorado identification.

The purchasing limits were established in 2013 to prevent marijuana diversion out of state.

Colorado pot regulators now say that tourists carrying small amounts of pot home aren’t the state’s main marijuana-diversion problem.

Instead, state regulators and local law enforcement point to underground pot growers as the most likely source of sending pot to states where the drug isn’t legal. [Read more at The Denver Post]