You can always file a new claim based on the change in law.
I'd also like to know if there are any sites where I can search my eligibility. What if I was a participant but have no recollection of it?
if you have any information that can help show you were part of them  including whether you may have been part of them or contact the Department of Defense at 800 - 497 - 6261 .
I want to ask about the benefits for those who have an illness caused by Agent Orange, does my Father need to prove that his illness started during the time he served in the military?