House Bill 546 amends the Government Code to require, in a county with a population of three million or more, that the forensic portion of a medical examination of a child alleged to be the victim of sexual assault include certain photo documentation by a medical professional. The bill allows the medical professional to forego the photo documentation for good cause and requires the professional to document in the child's medical records the reason photo documentation was not produced. The bill sets out provisions relating to the admissibility at trial of the documentation.