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At minimum, new sites or web sites that have undergone substansive change will also comply with WCAG 2.0 Level AA. Whenever possible, we should comply with the even stricter standard of WCAG 2.0 Level AAA.
Target: WCAG 2.0 AA
WCAG
Understanding WCAG 2.0 (http://www.w3.org/TR/UNDERSTANDING-WCAG20/)
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