"And no, the manufacturers GVWR rating is NOT enforced by the law. Only the registered GVWR and road axle limits are enforced by law."
Probable true in the US but I "THINK" it is enforced in BC Canada. Someone can correct or confirm this.
I got kicked off a RV Forum because the Moderator did not like me saying the 14k GVWR number is irrelevant if I have proper tonnage.
I am SD licensed. I asked them about my tonnage as they don't specifically have a number. They said my license covers whatever weight I carry within my tires limits.