Prime Minister of Canada has granted former prime ministers an augmentation of honour on the personal coat of arms of those who pursued them. The heraldic badge, referred to by the CHA as the "mark of the Prime Ministership of Canada", consists of four red maple leaves joined at the stem on a white field ("Argent four maple leaves conjoined in cross at the stem Gules"); the augmentation has, so far, been granted either as a canton sinister or centred in the chief. To date, former prime ministers Joe Clark, Pierre Trudeau, John Turner, Brian Mulroney, Kim Campbell and Jean Chrétien were granted arms
Spouse of the Prime Minister of Canada does not officially play as active a role in Canadian affairs as the royal and viceregal consorts. The prime minister's spouse, however, is still generally regarded as a public figure, frequently accompanying the prime minister on campaign and other public appearances, and often hosting dignitaries at the prime minister's residence. At times, prime ministers' spouses have used their public status to promote charitable causes; Mila Mulroney was a spokesperson for the Canadian Cystic Fibrosis Foundation and other children's charities; Aline Chrétien was an active campaigner for literacy programs; and Laureen Harper was known for her support of animal welfare organizations