Regina said:
Could you please provide a link?
http://www.servicecanada.gc.ca/eng/about/reports/sin/cop/section3.shtml
Employers must ensure that employees with a SIN beginning with the number "9" are authorized to work in Canada and have a valid immigration document. ◦SINs beginning with the number "9" are issued to temporary foreign workers who are neither Canadian citizens nor permanent residents.
◦These SINs have a period of validity corresponding to the date the foreign worker is authorized to work in Canada, which has been granted by Citizenship and Immigration Canada.
◦If the immigration document is expired, the employer must ask the employee to contact CIC to obtain a valid document before hiring the employee. The employer must also inform the employee to apply with the new immigration document to Service Canada for the SIN record to be updated with the new expiry date.
◦All terms and conditions on the work permit, including authorized dates and locations of work, must be verified for the employer to hire this person.