AR Legistlature legistlates grammer rules

I've always wondered who wrote the grammar rules. I've been told that most of them exist based on consensus and historical usages. However, I now realize that the State's have the right to make grammar rules state law.

"Legislators will send Gov. Mike Beebe a resolution declaring 'Arkansas's' the proper possessive form of the state's name"

I guess the state can now get on to more pressing issues, like poverty, prison over-crowding, and education.