A text-only page, with equivalent information or functionality, shall be provided to make a web site comply with the provisions of this part, when compliance cannot be accomplished in any other way. The content of the text-only page shall be updated whenever the primary page changes.

Why this is important: The limitations of text-only pages were well known even at that time, though: they include the difficulty and cost of maintenance and the difficulty of insuring that content is truly equal in different versions of the page. Modern development standards have rendered the text-only page obsolete.