(2) one year, if the person, within the three years preceding the violation of this section, has been previously convicted of violating Section 56-5-2930, 56-5-2933, 56-5-2945, or a law of another state that prohibits a person from driving a motor vehicle while under the influence of alcohol or other drugs, or the person has had a previous suspension imposed pursuant to Section 56-1-286, 56-5-2951