Creates provisions relating to unlawful discrimination in places of public accommodation

HB 542 modifies Missouri's discrimination law to prohibit places of public accommodation (like restaurants, stores, and gyms) from designating changing rooms or restrooms for both sexes, except for family restrooms meeting ADA standards. It defines "sex" as the physical condition based on genetics and physiology as listed on a person's original birth certificate. The bill requires facilities to restrict changing rooms and restrooms to use by persons of the sex assigned at birth, banning access to facilities designated for the opposite sex. This applies to all public accommodations, including membership-based businesses that accept public members.