The 13 guidelines provide the basic goals
                     that authors should work toward in order to make content more accessible to users
                     with different disabilities. The guidelines are not testable, but provide the framework
                     and overall objectives to help authors understand the success criteria and better
                     implement the techniques. Success Criteria - For each guideline, testable success criteria are provided to allow WCAG 2.2 to
                     be used where requirements and conformance testing are necessary such as in design
                     specification, purchasing, regulation, and contractual agreements. In order to meet
                     the needs of different groups and different situations, three levels of conformance
                     are defined: A (lowest), AA, and AAA (highest). Additional information on WCAG levels
                     can be found in Understanding Levels of Conformance .