Where ICT offers visual modes of operation, it must offer at least one mode that works without sight. Notes point to well-formed semantic structure in web pages and apps and to audio or tactile interfaces as ways to meet it. C.4.2.1 passes it when every Annex B requirement marked for the WV column is met or when a vision-free mode is evidenced.
This control maps to 1 controls across 1 other frameworks. If you already hold one of them, the evidence you collected for it is the starting point here rather than new work.
Every mapping shown was judged rather than inferred from wording similarity, and the ones that failed review are published too. See the coverage reports and what was rejected.
The graph holds this control, the 1 it maps to, and the evidence behind each claim, over MCP and REST.