If not before, it has been effective since June 24, 2009, when it was in the Federal Register.
However, the FR stated "These
protections are self-executing, and
became effective May 20, 2009."
http://edocket.access.gpo.gov/2009/pdf/E9-14909.pdfMy question is "does anyone have a sample 90 day notice? I did not find it in the FR or any supplemetal documents, the bill, etc.