The Immigration and Naturalization Service is staying open til midnight Tuesday to accomodate the flood of illegal aliens trying to beat the deadline to apply for permanent residency. Illegal aliens with a current visa number must apply for permanent residency by the end of the month and pay a thousand dollar penalty. Otherwise, they must return to their home country, and apply through the U-S consulate there. Many of the people in this situation are in the country illegally, but are married to U-S citizens, or green card holders. Karen Ellingson is an attorney with Officino Legale, a non-profit legal office that serves the east metro area. She says she's been advising her clients to apply before the deadline and pay the thousand dollar penalty: