You’re saying that the definition of NBC has been messed with that long? Or am I not understanding you? Because if that’s what you mean, I do not agree.
Maybe some small faction wanted to change it for a long time, but the definition has been standard, taught in schools and on State Dept information until fairly recently, people remember this.
Messed with? No, the defination has been adjusted a few times since the 1700s. Like most of our laws.
The schools have done an abysmal job of teaching it if you look at how many people around during here do the know.