The international technical reference point is the W3C’s WCAG (Web Content Accessibility Guidelines). The Web Content Accessibility Guidelines (WCAG) 2.2 rest on four core principles, summed up in the acronym POUR: perceivable, operable, understandable and robust.
The guidelines are structured into different levels of conformance and offer verifiable methods for guaranteeing universal access to sites and applications. By following these standards, developers can break down complex digital barriers, making navigation more inclusive for every type of user.
In legislative terms, the European Accessibility Act, transposed in Italy in 2022, extends accessibility obligations to private bodies providing essential digital services (banks and transport operators, for example), with full effect from 28 June 2025.