36 CFR Part 1194 - Proposed Information and Communication Technology (ICT) Standards and Guidelines NPRM - Preamble

501.1 Scope (Section-by-Section Analysis)

This section proposes that the technical requirements for software in this chapter be applied where either (a) required by 508 Chapter 2 or 255 Chapter 2, or (b) where otherwise referenced in any other chapters. There are two exceptions. Exception 1, as proposed, provides that Web applications conforming to all Level A and AA Success Criteria and all Conformance Requirements in WCAG 2.0 need not conform to proposed 502 (Interoperability with Assistive Technology) or 503 (Applications). This exception is provided because software that conforms to WCAG 2.0 AA is already accessible. The value of promoting a single harmonized standard outweighs any small benefit that might be achieved by conforming to overlapping, but separate, standards.

Exception 2 proposes that software that (1) is assistive technology and (2) supports the accessibility services of the platform for which it is designed need not conform with the provisions of this chapter. This exception is included because assistive technology frequently needs flexibility in order to perform well for end-users with disabilities. For example, a switch-activated on-screen keyboard might not have a mode that makes it usable by someone who is blind. This exception is also deliberately limited to software that follows platform specifications because it is important that assistive technology be compatible with other assistive technology.