“Web accessibility refers to the inclusive practice of removing barriers that prevent interaction with, or access to websites, by people with disabilities.", says Wikipedia. In the field of websites and web applications, there is a standard issued by W3C, named WCAG 2.0, which defines what is meant by accessible content.
The Stanca Law governs how content is accessible in accordance with the standard WCAG 2.0, and therefore also according to the Italian law. The vast majority of international regulations follow the same philosophy.