Immigration law refers to the rules established by the federal government for determining who is allowed to enter the country, under what terms, and for what duration. It also governs the naturalization process for those who desire to become U.S. citizens. The body of law also determines what occurs when foreign nationals enter without permission, overstay their visit, or otherwise lose their legal status. The firm focuses on family-based immigration, asylum and withholding of removal, special immigrant visas (SIVs), and employment-based immigration.