 The bill also states that a retail clerk who fails to identify the age of the purchaser would not be found guilty unless the retail clerk was a willful participant in an ongoing conspiracy to sell dextromethorphan to minors.This bill took effect January 1, 2012.Colorado House Bill 18-1307 states that it is unlawful for a store to provide a product containing any amount of dextromethorphan to a person that is under the age of 18.