Complex sentence: All Canadian passports are issued by Passport Canada, a special branch of the Citizenship and Immigration Canada, and are valid for five or ten years, except that those of children under age three are valid for three years.
Split into simpler sentences: All Canadian passports are issued by Passport Canada, a special branch of the Department of Citizenship and Immigration. They are normally valid for five or ten years, except those of children under age three which are valid for three years.