JBA ML - Backup machine auth code

As part of our IT deployment, we are planning to have a second machine in
our network, at another site which will provide the Group with a fall-back
in the case of a major disaster.

This machine will be of the same configuration than the 'live' machine, in
terms of Ram, disk, CPU type, but will obviously have a different serial
number. It will kept up-to-date with the data backup, and used only in the
case of a major breakdown, or disaster on the live system, such as fire or
total destruction of our production site.

For those who have been through this or have started investigating , what
arrangements have you been
able to reach with GEAC for authorisation codes ? or else what is your
undestanding of their position on that question  ?
Thanks for your contribution