DENVER - After an uproar over a court ruling that 12-year-old girls can enter common-law marriages in Colorado, legislators appear ready to change the age requirements rather than scrap the concept altogether when they convene in a special session Thursday. Gov. Bill Owens called the session primarily to address illegal immigration but also asked lawmakers to consider either scrapping common-law marriage or raising the age requirements. He suggested using the minimum ages required for statutory marriage: people ages 16 and 17 can marry with parental or judicial approval, while those 18 and older can marry on their own decision. The state Court of Appeals ruled on June 15 that Colorado has no stated minimum age for common-law marriage but said the state has adopted English common law, which makes girls as young as 12 and boys as young as 14 eligible.