Under the FDA standard of identity for bread, rolls, and buns (21 CFR 136.110), calcium bromate is a permitted optional dough-strengthening ingredient, capped (with potassium bromate and related oxidizers) at no more than 0.0075 part per 100 parts of flour.
U.S. federal rules still allow calcium bromate as a dough-strengthening agent in standardized bread, but only up to a combined cap of about 75 ppm shared with potassium bromate and a few related oxidizers.