A group called Right to Know Colorado has filed preliminary paperwork in Colorado to put a GMO labeling iniative on the 2014 ballot. State officials will review the ballot question's language and determine its title on Wednesday, before a petition drive may begin. If approved, 86,000 signatures will be needed to put the issue on the 2014 ballot.

The rule would require prepackaged, processed foods and raw agricultural commodities containining GMO ingredients to bear a label reading, "Produced with genetic engineering." Certain exceptions for alcohol, chewing gum and pet foods are currently written into the ballot question.

Washington voted against a labeling bill last month, while California voted against a similar bill last year.