HB 403, titled the Female Prisoner Protection Act, mandates that inmates and juveniles in facilities operated by the Texas Department of Criminal Justice (TDCJ) and the Texas Juvenile Justice Department (TJJD) be housed according to their biological sex, defined as the sex listed on official birth certificates or observed during intake screenings. The bill requires adherence to federal Prison Rape Elimination Act (PREA) standards to ensure inmate safety, includes provisions for denying, suspending, or revoking juvenile facility registrations for noncompliance, and allows specific exceptions to ensure individual safety under PREA guidelines. Relevant boards are required to adopt rules to ensure compliance with state and federal law. The act takes effect immediately upon receiving a supermajority vote or on September 1, 2025.