The law is quite clear on that. I can make a recommendation to the Governor in Council only in cases where it is impracticable. That's the criterion, that it's impracticable for me to conduct the election. That has to do with the capacity of having poll sites, for example, if there's a flood, the register of electors being accessible or if there's an attack, but it does not deal with the parties' own challenges.
On February 7th, 2019. See this statement in context.