1.1.1 Non-text content which controls input

Hi

Please can you provide some clarification on 1.1.1 Non-text content which controls input.

If a <input> has no visible label and no accessible name, I would assume that fails 4.1.2 and 3.3.2 only, but I have just noticed H44 refers to 1.1.1? (ARC Chrome plugin also cites ‘no accessible name’ as 1.1.1.)

It seems to me that the SC specifically excludes user interface controls as they are specifically covered elsewhere. In what situations would H44 apply?

Thanks

Sarah