The category of Working visa has 14 different Status of Residence depending on the kind of the work that will be done. The term of residence usually granted is 1 or 3 years. When you apply for a work visa you will need to submit documents to prove the intended activity. The required documents are different depending on which Status of Residence you fall under. You are not allowed to engage in work that falls under another type or category other than that allowed under your Status of Residence. If you have a Certificate of Eligibility you are sometimes not required to submit other proof of the purpose of your stay.