For Public Secondary Schools: DO Memo No. 4, s.17 SEMINAR-TRAINING OF OFFICIATING OFFICIALS IN BOXING , BASEBALL AND SOFTBALL AND COACHES IN DANCE SPORTS AND AERO GYMNASTICS Posted on January 26, 2017 by DepEd Mandaluyong Leave a comment 17-01-111. DO Memo No. 4, s.17 SEMINAR-TRAINING OF OFFICIATING OFFICIALS IN BOXING , BASEBALL AND SOFTBALL AND COACHES IN DANCE SPORTS AND AERO GYMNASTICS Memorandum