Here is a link from IDEA:
I Hope This Helps!
These articles from IDEA might help:
Contact the specific organization whose conference you would like to participate in. They will generally have written guidelines and requirements for you to peruse and see whether you qualify to serve as one of their presenters. Assuming that you do, then you can pose your seminar/workshop idea (of course following the specific format that they require). If they like it, they will contact you.