Propelled by the advancement of gay rights across the country over the past few years, Aurora college student Mark Olmstead hopes to overturn the 2006 ballot measure that defined marriage in Colorado as between a man and a woman.

The state’s title board will review the language of his ballot- initiative proposal next week. If it is approved, the next step will be to collect 86,000 signatures to get the initiative before voters in the 2012 election.