Do you mean that CAD software itself has to comply with certain regulations? Or that it helps engineers comply with regulations regarding their designs?
Not a professional CAD user myself, but as a hobbyist with an interest in this space I've never heard of the former case, so I'm curious.
> it helps engineers comply with regulations regarding their designs
This one, I should had frame it better.
> I've never heard of the former case
I don't think the CAD software itself is a point of a regulations, but there are definitely some standards and regs regarding how it should be done. A quick search yielded [0] which is a nice example of how it could be done by a hand, yet it would help immensely if the CAD software would aid and do the things by itself, saving both the time and man-hours.
I do wonder who is liable if the software used to design a bridge outputs incorrect simulation results and the bridge collapses as a consequence. I suppose it's on the senior project engineer (or whoever ultimately signs off on the design) to verify the results somehow.
Edit: This article [0] talks about the "trust" placed in commercial and open-source CAD software by engineers and doesn't mention regulation/certification of the software itself, which seems to imply that there is none.
Not a professional CAD user myself, but as a hobbyist with an interest in this space I've never heard of the former case, so I'm curious.