Eligibility to apply Open Work Permit:
The criteria may include a valid temporary resident status, such as being on a study visa or work permit, and a valid job offer for your spouse in Canada.
As a dependent with valid open work permit lets you work for any employer in Canada. You can check the list of eligible employers to work in Canada here.
You can only apply for an open work permit, if your spouse, common-law partner or parents have a valid study visa or work permit.
Fees:
Visa Fee: $155
Open Work Permit Fee: $100
Biometric Fee: $85
Processing Time: Varies by Country you are applying for visa.