Success Criterion 3.2.6 - Level A
If a web page contains any of the following help mechanisms, and those mechanisms are repeated on multiple web pages within a set of web pages, they occur in the same relative order to other page content, unless a change is initiated by the user:
Human contact details;
Human contact mechanism;
A fully automated contact mechanism.
The intent of this Success Criterion is to ensure users can find help for completing tasks on a Web site, when it is available. When the placement of the help mechanism is kept consistent across a set of pages, users looking for help will find it easier to identify. This is distinct from interface-level help, such as contextual help, features like spell checkers, and instructional text in a form.