Each Contracting Officer (CO) has a specific warrant which states the conditions under which they are permitted to engage in Federal contracting as an agent of the Government. The authority of a Contracting Officer to contract on behalf of the Government is set forth in a public document (a certificate of appointment, formerly called a "warrant") which a person dealing with the Contracting Officer can review. The CO does not have authority to act outside this warrant or to deviate from the laws and regulations controlling Federal Government contracts. The private contracting party is held to know the limitations of the CO's authority, even if the CO does not. This makes contracting with the United States a more structured and restricted process than a commercial one.