Gov. John Hickenlooper of Colorado on May 28 signed a new set of laws regulating the use and sale of cannabis. One law, HB13-1317, expands the medical marijuana enforcement division to cover retail cannabis sales. The law also prohibits retail cannabis outlets from selling more than one-fourth of an ounce to non-residents. Another law, HB13-1318, still subject to voter approval in the November statewide election, imposes a 15% sales tax on retail cannabis or cannabis products, and allocates 10% of the total tax revenue among the state's local governments that have at least one retail cannabis outlet. A third law, HB13-1325, provides that motorists found to have blood levels of five nanograms or more of delta 9-tetrahydrocannabinol per milliliter may be charged for DUI.