When a public official or reporter claims the privilege conferred by AS 09.25.300 - 09.25.390 and the public official or reporter has not been divested of the privilege by order of the supreme or superior court, neither the public official or reporter nor the news organization with which the reporter was associated may thereafter be permitted to plead or prove the sources of information withheld, unless the informant consents in writing or in open court.
Alaska Legal Code