The accessibility requirements apply only so far as compliance does not require a substantial modification that changes the basic nature of the product or service, or impose a disproportionate burden on the operator. Operators must assess whether either condition applies, assessing the burden on the Annex V criteria; an operator receiving public or private funding to improve accessibility cannot invoke disproportionate burden.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.