8 GCA § 95.15: Establishment of Prior Convictions.

For the purpose of establishing prima facie evidence of the fact that a person charged with a crime has previously been convicted of another crime in this Territory, or in any state, territory, or insular possession of the United States, which would be punishable as a crime in this Territory, or has been convicted of an act declared to be a crime by any act or law of the United States, and has served a term therefor in any penal institution, the records or copies of records of the penal institution, in which such person has been imprisoned when such records or copies thereof have been certified by the official custodian of such records, may be introduced as such evidence.