The National School Lunch Program (NSLP) is a federally assisted meal program operating in more than 101,000 public and nonprofit private schools and residential child-care institutions. Established under the National School Lunch Act and signed into law by President Harry Truman in 1946, the NSLP provides nutritionally balanced, low-cost and free lunches to more than 30 million children each school day. The meals must be offered for free or at a reduced-price for eligible children. They also must meet the Federal nutrition requirements in line with the Dietary Guidelines for Americans, which is updated every five years.