In Colorado to formally petition for the dissolution of marriage a spouse must declare an accepted grounds in which a divorce is being sought within the Colorado divorce courts. A specific and lawful ground in which both parties agree upon can consist of many different reasons. The only grounds under which dissolution of marriage can be proven is that the marriage is irretrievably broken. Reasons under the irretrievable broken ground can be numerous and specific to a particular marriage. However these reasons must be proven in the courts for the dissolution of a marriage. Traditional fault grounds such as adultery, abandonment, habitual drunkenness and mental cruelty may not be used as reasons for petition.