From Transport Canada: Face Covering
Effective as of noon on April 20, 2020, air travellers flying from and into any Canadian airport, will be required to wear a face covering or they will not be allowed to fly.

Effective as of noon on April 20, 2020, air travellers flying from and into any Canadian airport, will be required to wear a face covering or they will not be allowed to fly.
Federal Skilled Workers and Federal Skilled Trades candidates who do not have a Canadian job offer will need the following amounts to remain eligible for immigration: Number of Family Members Fun