In order to maximise the foreseeable use by persons with disabilities,, when the accessibility requirements, set out in Sections I to VI of this Annex, do not address one or more functions of the design and production of products or the provision of services those functions or means shall be accessible by complying with the related functional performance criteria.

Those functional performance criteria may only be used as an alternative to one or more specific technical requirements, when these are referred to in the accessibility requirements, if and only if the application of the relevant functional performance criteria complies with the accessibility requirements and it determines that the design and production of products and the provision of services results in equivalent or increased accessibility for the foreseable use by persons with disabilities.

(a) Usage without vision

Where the product or service provides visual modes of operation, it shall provide at least one mode of operation that does not require vision.

(b) Usage with limited vision

Where the product or service provides visual modes of operation, it shall provide at least one mode of operation that enables users to operate the product with limited vision.

(c) Usage without perception of colour