students themselves, to proceed with any treatment or intervention to affirm the student’s purported gender identity , where that gender identity is incongruous with the student’s biological sex. (b) Rules of construction Nothing in this section shall be construed— (1) to prevent a school employee from contacting appropriate legal authorities about an imminent threat to a student’s physical safety in the event that the school employee knows or has a reasonable suspicion that the student is at risk of physical abuse, as defined in section 1169 of title 18, United States Code