As an aside, "grandfathered in" is a historically terrible term. The term you're looking for is a "legacy license".
It's not terribly well known just how terrible this phrase actually is. I ran across it myself probably a few months back.
> "If all these white people are going to be noncitizens along with blacks, the idea is going to lose a lot of support," says James Smethurst, who teaches African-American studies at the University of Massachusetts. The solution? A half-dozen states passed laws that made men eligible to vote if they had been able to vote before African-Americans were given the franchise (generally, 1867), or if they were the lineal descendants of voters back then. This was called the grandfather clause. Most such laws were enacted in the early 1890s.
It's not terribly well known just how terrible this phrase actually is. I ran across it myself probably a few months back.
> "If all these white people are going to be noncitizens along with blacks, the idea is going to lose a lot of support," says James Smethurst, who teaches African-American studies at the University of Massachusetts. The solution? A half-dozen states passed laws that made men eligible to vote if they had been able to vote before African-Americans were given the franchise (generally, 1867), or if they were the lineal descendants of voters back then. This was called the grandfather clause. Most such laws were enacted in the early 1890s.
https://www.npr.org/sections/codeswitch/2013/10/21/239081586...