Sun Visors - My engineer (Trevor Booth) knew the full story : if they are fitted, they must conform to the standards (soft padding, no sharp edges, etc). However, they are not mandatory - so I didn't bother.
Reversing Lights - at least one x 21W lamp. I have 2, but they are mounted behind the rear mesh panels. Trevor had me take the mesh panels off before he photographed the car & passed the lights.