<Tr> <Td> The death of any member of the Royal Family, a former Governor General, the sitting Chief Justice of the Supreme Court, sitting Ministers of the Crown, or a former Prime Minister </Td> <Td> From the time of notification of death until sunset on the day of the funeral or, if there is to be a memorial service, from the time of notification of death until sunset the following day and from sunrise to sunset on the day of the service </Td> </Tr> <Tr> <Td> The death of a police officer in the line of duty . </Td> <Td> The flag could be flown at half - mast from a couple of days to weeks, depending on the ranking of the officer . </Td> </Tr> <Tr> <Td> April 28 of each year </Td> <Td> Marking the Day of Mourning for People Killed or Injured in the Workplace (coinciding with World Day for Safety and Health at Work) </Td> </Tr> <Tr> <Td> June 23 of each year </Td> <Td> Marking the National Day of Remembrance for Victims of Terrorism </Td> </Tr>

Who should the flag be flown at half mast for