I found this today, prompted by a comment on this blog:
14. Changes to the Terms
the NBTA reserves the right, at its discretion, to make changes to any part of the Site or the Terms. When the Terms are changed, the NBTA will publish details of the new Terms as updated from time to time.
It could be rewritten:
The CRT reserves the right under its government mandate to make changes to any or all of the rules or the Terms of your licence conditions. CRT will publish updates as and when they occur.
The question I ask is why is this OK for the NBTA and not OK for CRT.