Privy Councillors receive a document called a commission from the Governor General, summoning them to the Privy Council; swear two oaths: the Oath of Allegiance to the Queen, and the Oath of the Members of the Privy Council; and sign the Oath Book; carry the title "Honourable"1 for life and use the initials "P.C." after their names; are given a position of precedence on the Table of Precedence; and are honoured by half-masting of the flag on the Peace Tower upon their deaths.
About the Queen's Privy Council of Canada
1 According to the Table of Titles, the Prime Minister, the Chief Justice, and some eminent Canadians are to be styled "Right Honourable" for life.