INDIANAPOLIS (WISH) — Students at all public universities and K-12 schools would have to use the bathroom that aligns with their sex assigned at birth under a bill the Senate approved late Tuesday afternoon.

Bill author Sen. Liz Brown, R-Fort Wayne, said the measure originated as a bill to require the Indiana Department of Correction to place inmates in facilities that match their sex assigned at birth. During the drafting stage, she added language to require birth certificates to match a person’s sex assigned at birth and prohibiting any changes except in cases of a diagnosed sex development disorder.

Then, during a committee hearing last week, lawmakers added la...