The federal government is asking a labour tribunal to review whether a strike by rail workers would jeopardize Canadians’ health and safety. Prompted by concerns from industry groups, the request to the Canada Industrial Relations Board from Labour Minister Seamus O’Regan may push back a potential work stoppage that could otherwise start less than two weeks from now. The tribunal is set to examine agreements between workers and management about what critical work must continue in the event of a strike or lockout, with any stoppage on pause until a decision on that issue is made. Last week, employees at the country’s two main railways authorized a strike mandate that could see some 9,300 workers walk off the job as soon as May 22. The Teamsters Canada Rail Conference… has warned that a strike at both companies simultaneously would disrupt supply chains on an unprecedented scale.