Two letter names are not
allowed -- they are reserved for ISO country codes.
Two character names are
allowed. i.e. 3x.co.uk where the format is not aa.foo.uk.
All second level names of
.uk are banned from being used as third level names. i.e. nhs.co.uk would be
banned as it is a second level name.
All top level domains are
banned from being used as third level names. i.e. net.org.uk and org.co.uk
are not allowed.
All one character domain
names (ie [a-z0-9].xxx.uk) are reserved for possible future sub-domain usage.
The only one currently delegated is X.CO.UK. The owner shall still maintain it
unless they volunteer to relinquish it.
There shall be at least
two name servers for the domain (with addresses specified in the request)
operating at the time the request is submitted. There is no restriction on the
physical location or IP address of these name servers.
