I'm not sure what the set time is to register a birth in Canada, however an ancestor of mine was born in Toronto, On Nov 1886 and his father registered his birth July 1918 (32 years later). The Ontario Declaration was notarized in Detroit, Mi where the father was living. The Declaration was "In the Matter of Registering a Birth which has not been registered in accordance with Section 15 & 18, the Vital Statistics Act, RSo 1914, c.49. The son lived in Toronto with an uncle so I am assuming that his parents separated.