How does GCVWR affect stopping if you have trailer brakes?

I haven't read the SAE but I guarantee they have some fudge factors in their.

It's all well and good to say the trailer stops itself but reality is especially away from commercial operators, that's often not the case.

Plus, just having one operational brake on the trailer and none on the truck...you will likely eventually come to a stop on level ground...but I wouldn't want to try it in real life.