I'm sick of this. Comments slagging off about regulators are just unfounded.
Here are the documents and research details to date.
ICAO volcanic ash contingency plan, edition 2 September 2009.
Documents
ICAO manual.
http://www2.icao.int/en/anb/met-aim/...Amend.%201.pdf
ICAO taskforce:
ICAO NEWS BRIEF ICAO News Centre