Judges shall observe carefully and expertly the performance of the participants in each contest or exhibition to which they are appointed; to appraise each such contest or exhibition fairly and accurately in the light of these rules and the generally recognized rules of boxing; to inscribe the results of such appraisal after each round on the commission scorecard according to the scoring system adopted by the commission; and to deliver said scorecards to the referee or to such other official as designated by the commission.