(b) In a case referred to it, the board of review may act only with respect to the findings and sentence as approved by the convening authority. It may affirm only such findings of guilty, and the sentence or such part or amount of the sentence, as it finds correct in law and fact and determines, on the basis of the entire record, should be approved. In considering the record it shall have authority to weigh the evidence, judge the credibility of witnesses, and determine controverted questions of fact, recognizing that the trial court saw and heard the witnesses.
(c) If the board of review sets aside the findings and sentence, it may, except where the setting aside is based on lack of sufficient evidence in the record to support the findings, order a rehearing. If it sets aside the findings and sentence and does not order a rehearing, it shall order that the charges be dismissed.
(d) The state judge advocate shall, unless there is to be further action by the governor, instruct the convening authority to take action in accordance with the decision of the board of review. If the board of review has ordered a rehearing but the convening authority finds a rehearing impracticable, he may dismiss the charges.
(e) In the event one or more boards of review are constituted in accordance with this section, the state judge advocate shall prescribe uniform rules of procedure for proceedings in and before such board or boards of review.