I remember reading in a version of the SVA manual when I was first starting my build (around 2000) that there were a set of measurements you had to meet for the seat belt fixings. When looking at the latest version of the SVA book I cannot see anything like this. Are there not the same restirctions on the measurements of the mounts?

Thanks

Is this what you mean ? Section 5 annexe 4 in the latest manual.
Rescued attachment seatbeltfix2.jpg