Well done qwerty2, good to see other people delving into the
WWW. Simple answer is, no there is not an obvious explanation. Complex answer, The Bill as per my link was voted on in the House of Lords and passed on Nov29th 2000. The Act in your link is published 7 days later as a result of the bill passing through the House of Lords. There were no further debates or amendments on the bill, so the bill that passed is as it appears. I will endeavour to obtain clarification from other sources and publish here in the future.
I do enjoy quality debating over the usual crap in here!!