Relating to the police officers' public retirement system of certain municipalities.

HB 3521 amends Texas law defining "catastrophic injury" for police officers in certain municipalities' retirement systems. It specifies that a catastrophic injury must be a sudden, life-threatening, duty-related injury causing permanent loss of sight, limbs, or paralysis, or a severe brain injury requiring constant supervision and rendering the officer unemployable. The bill explicitly excludes infectious diseases, chronic conditions from occupational exposure, post-traumatic stress disorder, and minor soft-tissue injuries from this definition. These changes directly affect police officers who sustain qualifying injuries while on duty, determining their eligibility for enhanced retirement benefits under the system. The bill focuses on clarifying eligibility criteria rather than altering benefit amounts or funding mechanisms.