"...the South Dakota Legislature
approved a bill that would require public school students to use bathrooms and other facilities that correspond to their biological sex, defined in
the bill as “a person’s chromosomes and anatomy as identified at birth.” Gov. Dennis Daugaard, a Republican, vetoed it. The Legislature announced in January that it would consider a similar bill..."
"...
California requires gender-neutral bathrooms
September 2016 | Gov. Jerry Brown, a Democrat,
signed a bill requiring all single-toilet bathrooms to be gender neutral, effective March 1, the first such state legislation in the country.
Texas considering legislation
Jan. 5, 2017 | A bill revealed by Lt. Gov. Dan Patrick, a Republican, would require transgender people to use bathrooms in government buildings and public schools and universities based on their “biological sex,” overruling any contrary local rules, and raising the prospect of
a new confrontationwith college sports officials and professional sports leagues.."
Understanding Transgender Access Laws