he USCIS has taken the position that a person is only authorized to work in those cities / metropolitan areas listed on the Labor Condition Application (LCA) certified with the U.S. Department of Labor (DOL), and filed with the H1B petition. Generally, there must be a certified LCA for each location at which one will work, attesting that the employer will comply with the prevailing wage requirement for that local area. It is best to consult with an experienced immigration attorney prior to working at a location not previously certified.