If, while intercepting a private communication under the provisions of AS 12.37.010 - 12.37.130, a peace officer intercepts a communication that relates to a felony offense other than one specified in the order of authorization, the attorney general, or a person designated in writing or by law to act for the attorney general, may file a motion for an order approving that interception so that the communication, or evidence derived from it, may be used during testimony in an official proceeding. A court may enter an order approving the interception if it finds that the person who intercepted the communication was otherwise acting under the provisions of AS 12.37.010 - 12.37.130.