Accuracy and changes

Continuing accuracy is not promised. Where a decision turns on a current figure or rule, confirm it at its source.

Running the site

The site is not guaranteed to be available at all times. The operator may edit, relocate, or delete pages.

Sites run by others

Linked pages are outside this site's control. Each one runs under terms of its own.

If this changes

Updates appear on this page and are not sent out separately. Reading the page is the way to see the current version.

Raising a question

Queries about the terms on this page may be sent to [email protected].