http://www.cicnews.com/2013/05/cana...s-answers-attorney-david-cohen-11-052502.html
从这里copy下来一段问答:
My child is over 18 but is a full-time student and relies on me for all financial support. Can I consider them my ‘dependent child’ for an immigration application?
At the present time, unmarried children who are less than 22 years old on the date of application can be included in immigration applications as dependent children. However, CIC recently announced that it intends to revise the rules relating to dependent children with effect from January 1st, 2014. This recent announcement indicated that the new revised rules will allow children who are less than 19 years old on the date of application to be included as dependents in an immigrant application. In addition, children who are over the age of 19 years but are financially dependent on their parents due to a mental health or physical disability will continue to be considered as dependent children for immigration purposes。
19岁or以上的需依靠父母的残疾(精神上,身体上)孩子,才可以带。