51. (1) A Court undertaking a trial under this Chapter may, in the course of such trial investigate into any charge against any ¹[owner and] master, engineer, engine-driver or any other person holding a certificate or licence granted under this Ordinance of incompetency, misconduct, wrongful act or default which might have caused, or contributed to the occurrence of, the casualty. (2) For the purpose of an investigation under sub-section (1) into any charge against any person, the Court may summon him to appear and shall give him full opportunity of making a defence, either in person or otherwise.