From the website:
You may be eligible for an open work permit if you’re:
a spouse of a skilled worker in an occupation under the National Occupational Classification (NOC) skill type 0, A or B approved to work in Canada six months or longer,
a spouse of a foreign student at a public post-secondary school, such as a college or university or collège d’enseignement général et professionnel (CEGEP) in Quebec,
a family member of a foreign representative, or
a family member of a foreign military member who is working in Canada.
If your spouse has an open work permit (e.g. post-graduation work permit), you must attach a copy of your spouse’s work permit to your application for an open work permit, along with:
a letter from your spouse’s current employer that confirms they work there in a NOC 0, A or B occupation, or a copy of your spouse’s employment offer or contract, and
a copy of your spouse’s recent pay slips.
Your permit will not be valid longer than your spouse’s work permit.
