Need to set a few things straight here...
There is no 'worldwide cover' dispatch licence.
FAA licence does not take 3 weeks, it takes 6.
Am curiouos to know what licence requires 1year of training unless it is some part time course.
An ICAO licence is one that where the course material and topics covered are those in accordance with the ICAO standard for flight operations officers.
Both FAA and GCAA fit that description; there is no JAA licence right now.
If you can't find information on google then you're not looking in the right places
www.sheffield.com and
www.eufalda.org are good places to start.