This is confusing me, is this the same as "at or below the federal poverty level" or is there something I'm missing with that 400%? Do you have to be 400% below the federal poverty level to qualify?
Many programs use that, or variations on like (like this 400%) - to index. So if the poverty line for a family of four is 32,150$ - then this program is available to your family of four until you make over 128,600$.
Others will say "below 200% FPL OR qualifying condition" (think newborn, pregnant, etc). So some programs are open to baseball player families, as long as the qualifying condition is there.