I was talking about Canada, McGrath of Harlow, and local city by-laws here, but yes, they are all over the USA as well. These regulations on weeds are nearly all city by-laws, except for those on some particluarly vicious plants where the law may be state- or province- enforced.
Doesn't London have by-laws against noxious weeds and regulations enforcing their clean-up? I think they, and most other English cities, do!

Alice, we are both wrong. Root beer was made in the American colonies, according to documented records. Dates for its manufacture in England go back to 1843. Sassafras was shipped to England long before that, but apparently was only used in teas and mead. Hires root beer debuted in Philadelphia at the 1876 US Centennial Exhibition.

root beer
It gives 1960 as the date the FDA outlawed sassafras in foods.
Here is an old-fashioned recipe from Fleishman's yeast:
1912 recipe Someone mentioned a "soapy" taste. It could have been from the yeast.