The subclass 491 is a skilled work regional visa to fill the skill shortages in specified areas. Australian state or territory governments can nominate the skilled workers that allow them to live, work and study in the designated areas. The subclass 491 visa allows the nominated people to stay in Australia for 5 years. The subclass 491 also permits you to travel to and from Australia as many times as you want. Holders of 491 subclass can apply for Australian PR after 3 years.