The Divorce Act (Canada) defines a child of the marriage as:
- Children of both you and the other parent who are under the age of majority and who are dependent on you. The age of majority is either 18 or 19, depending on the province or territory in which the child lives. In British Columbia the age of majority is 19.
- Children to whom either you or the other parent has acted in place of a parent (for example, if one of you was a step-parent).
- Children at or over the age of majority who are still dependent on you due to illness, disability, or other cause. The courts have generally recognized post secondary education as a valid "other cause".