The following lines were added to the zone files int.2a06.zone and ext.2a06.zone:

;
$ORIGIN 1.1.0.1.3.7.0.8.0.0.0.4.6.0.a.2.ip6.arpa.
@                   NS      hamgate.apana.org.au.
;

This is all that is required to delegate a sub-domain. Steve will have to add a zone file

To be able to answer the requests for reverse lookup to 2001:44b8:5135:7c07::/64 the following was done. A zone file was created in /var/cache/bind/pri:

#ext.7c07.zone 
; 
; Zone file for my subdomain from Steve ('7c07') -IPv6 reverse look-up - external view
;
$TTL 1d
@           IN SOA  oz6bl.dk. hostmaster.oz6bl.dk. (
                    2025010201 ; serial
                    6h         ; refresh
                    2h         ; retry
                    2d         ; expire
                    1h         ; negative caching TTL of 1 hour
                    )
                    NS      ns.oz6bl.dk.
                    NS      hamgate.apana.org.au.
                    NS      ns01.one.com.
                    NS      ns02.one.com.
$ORIGIN 7.0.c.7.5.3.1.5.8.b.4.4.1.0.0.2.ip6.arpa.
;
1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0 IN PTR     nounours.oz6bl.dk.
2.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0 IN PTR     langben.oz6bl.dk.
5.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0 IN PTR     mail.oz6bl.dk.
5.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0 IN PTR     www.oz6bl.dk.
d.6.b.8.5.8.e.f.f.f.e.2.1.0.2.0 IN PTR     mail.oz6bl.dk.

These lines were added to the master part of the external view in /etc/bind/named.conf.local:

zone "7.0.c.7.5.3.1.5.8.b.4.4.1.0.0.2.ip6.arpa" IN {
      type master;
      file "pri/ext.7c07.zone";
      allow-transfer { "Secondaries"; };
      also-notify { "Secondaries"; };
      notify explicit;
};