Section 508 vs WCAG, Explained.
People use the terms interchangeably, but they are not the same thing. Section 508 is a US law; WCAG is the technical yardstick it relies on. Here is how they fit together, and how a VPAT documents both.
One Is the Law, the Other Is the Measuring Stick
Section 508 sets the legal requirement for US federal technology; WCAG defines the testable success criteria that determine whether web content meets it.
Section 508 Is the Law
Section 508 of the Rehabilitation Act requires US federal agencies, and many federally funded programs, to make their information and communication technology accessible.
WCAG Is the Standard
The Web Content Accessibility Guidelines, published by the W3C, are the testable success criteria (Level A, AA, AAA) that define accessible web content.
The 508 Refresh Connected Them
The 2017 Section 508 Refresh adopted WCAG 2.0 Level A and AA by reference, so meeting those WCAG criteria is how you satisfy 508 for web content.
508 Covers More Than the Web
Section 508 also addresses hardware, software, functional performance criteria, and documentation, not just web pages. WCAG is specifically about web content.
A VPAT Documents Both
A VPAT 2.x records conformance against WCAG and, in the 508 edition, the broader Section 508 chapters, which is why it is the standard procurement artifact.
Score Either With VPAT Score
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