President Bush has signed into law a supplemental spending bill that has a further $19.8 billion in disaster relief funds, most of it for the Gulf Coast. The measure, enacted June 15, includes $3.7 billion for the Corps of Engineers for New Orleans-area levee repairs, canal closures and pumping stations, $5.2 billion in Housing and Urban Development Dept. block grants and $502 million for military bases in Mississippi and Louisiana.