WCAG Reference: This corresponds to WCAG2.4
Requirement: You MUST ensure your website design follows a consistent navigation scheme across all pages, and that the menus or other navigation mechanisms are located in the same place.
Why is this required? People will need to know what to expect. It can vary across devices but should be consistent within that device.
Recommendations: Objects that appear on all web pages should be located in the similar place relative to each other on each page and are identified by the same name
Requirement: You MUST provide more than one way for users to move around your site.
Why is this required? Some methods of navigation will suit some people better than others. For example, people with cognitive impairments may prefer to work with a site map which provides an overview of the website.
Example: Provide a navigation menu, or a site map
Exceptions: Where web pages are generated as the result of, or a step in, a process, such as a payment process, or a registration process or assessment which you would not necessarily want to include in a site map.
WCAG Reference: This corresponds to WCAG 2.4.5
Requirement: You MUST provide information to help users identify their location within a set of web pages.
Why is this required? This is a general usability issue affecting all users and should be established good practice.
Examples: clear links back to the home page, use of breadcrumbs
WCAG Reference: This corresponds to WCAG2.4.8
‘Web accessibility’ is defined as the practice of making websites usable by people of all abilities and disabilities.
...about MUST, SHOULD or MAY?
The Terminology section explains why each of these terms is used, and what they mean.