Under current legislation, children are dependent if they are unmarried and under the age of 22, or if they have been full-time students since before the age of 22, attend a post-secondary educational institution and have been substantially dependent on the financial support of a parent since before the age of 22 or, if married or a common-law partner, since becoming a spouse or a common-law partner, or if 22 or older, they have been substantially dependent on the financial support of a parent since before the age of 22 because of a physical or mental condition. A dependent child is either a biological child or an adopted child.