The Financial Post reports in its Monday edition that Canadian workplaces are globally trail-blazing pot policies with nearly half of private sector employers imposing a blanket ban on weed use, says a Conference Board of Canada survey. The Post's Bill Kaufman writes that while legalization has pushed Canadian employers to addressing that reality -- 76 per cent had updated their pot policies prior to the end of prohibition last October -- many are still grappling with sensitive areas, said study researcher Monica Haberl. The survey of 163 employers found 48 per cent of them have adopted no-use-at-any-time rules for their workers despite the drug's legality, said the report titled Acting on the Cannabis Act. "There's a zero tolerance for use there, not just on the job but at all times and that's because testing for cannabis isn't perfect, they choose to be on the safer side," said Ms. Haberl. "In some cases, the employer would say, 'in order to get a job, you can't use cannabis.'" That is weighted heavily in so-called safety-sensitive industries like transportation or warehousing where heavy equipment is used, she said. Among public sector workers, 29 per cent have adopted that strict approach, states the study.