How the ICANN works is sometimes difficult to understand and the IANA plays a major role in how new gTLDs technically work.
If more people start to know what the ICANN is, very few have ever heard of what the IANA is.
For those interested in knowing more about how is IANA is linked to new gTLDs, I suggest to go down to page 12 of this report and read "3.1 Root Zone Management Categories".
Download the complete document here.
