http://www.cic.gc.ca/english/newcomer/res-oblig.html
Permanent Residency Obligations
Here is what you must do to comply with your residency obligations.
You must accumulate two years of physical presence in Canada in every five-year period. You can also count Canadian residency days if you are outside Canada for an extended period of time for one of the following reasons:
You are accompanying your Canadian-citizen spouse or common-law partner.
You are a child accompanying a Canadian-citizen parent.
You are employed on a full-time basis by a Canadian business, the Public Service of Canada or the public service of a Canadian province.
You are accompanying your permanent resident spouse or common-law partner who is also outside Canada and who is employed on a full-time basis by a Canadian business, the Public Service of Canada or the public service of a Canadian province.
You are a child accompanying a permanent resident parent who is outside Canada and employed on a full-time basis by a Canadian business, the Public Service of Canada or the public service of a Canadian province.
Please note that you are complying with your residency obligations only if:
your accompanying permanent-resident spouse, common-law partner or parent is complying with their residency obligations; and
you ordinarily reside with your accompanying Canadian-citizen or permanent-resident spouse, common-law partner or parent.
A child is someone under the age of 22 who has never been married or in a common-law relationship.
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