Help mechanisms such as contact details, messaging, chat, or self-help options must be in the same relative order on all pages where the information is present.
Help mechanisms are a broad scope of mechanisms. These must be in the same relative order on every page wherever the mechanism is repeated. It is not required to provide these mechanisms, only to put them in the same relative order if they do exist.
Help mechanisms in scope include
Human contact information (phone number, fax number, email addresses, hours of operation, physical address)
Direct human contact mechanisms (messaging client, live chat, contact forms, social media links)