Essential workers travelling to Canada, this includes: officials of a foreign government (including border service officers, immigration enforcement officers, law enforcement and correctional officers, who are escorting individuals travelling to or from Canada for a legal process such as deportation, extradition or international transfer of offenders), technicians or specialists specified by government authorities, personnel to support critical infrastructure (energy and utilities, information and communication technologies, finance, health, food, water, transportation, safety, government and manufacturing), business travelers for after-sales services, temporary workers entering for 15 or 30 days, and workers required for urgent repairs. A letter of approval issued by Canada is no longer required for these passengers;