Perhaps you’ve heard that the W3C (World Wide Web Consortium) has updated their Web Content Accessibility Guidelines (WCAG) 2.0. 

On April 24th, 2018, W3C posted a proposed extension of Web Content Accessibility Guidelines (WCAG) 2.0, referred to as WCAG 2.1.
On June 5th, 2018, WCAG 2.1 was no longer considered a proposal. WCAG 2.1 includes 2.0 and 17 new criterion.
When will I need to update my website?

Is there a law someplace that answers this? An official interpretation? A lawsuit that references the new criterion?